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200000000031021 = 3287725338907897
BaseRepresentation
bin101101011110011000100000…
…111101001111100100101101
3222020010210221212200122010100
4231132120200331033210231
5202203300000001443041
61545210422010101313
760061344305504121
oct5536304075174455
9866123855618110
10200000000031021
11587a9584034693
121a52140b41a839
138779bc42a0038
1437560a1a31581
15181c6d40986b6
hexb5e620f4f92d

200000000031021 has 12 divisors (see below), whose sum is σ = 289218294747772. Its totient is φ = 133181299901376.

The previous prime is 200000000031019. The next prime is 200000000031113. The reversal of 200000000031021 is 120130000000002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 89303067000900 + 110696933030121 = 9450030^2 + 10521261^2 .

It is not a de Polignac number, because 200000000031021 - 21 = 200000000031019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200000000030994 and 200000000031012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200000000031011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12669446056 + ... + 12669461841.

Almost surely, 2200000000031021 is an apocalyptic number.

It is an amenable number.

200000000031021 is a deficient number, since it is larger than the sum of its proper divisors (89218294716751).

200000000031021 is a wasteful number, since it uses less digits than its factorization.

200000000031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25338908780 (or 25338908777 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The spelling of 200000000031021 in words is "two hundred trillion, thirty-one thousand, twenty-one".

Divisors: 1 3 9 877 2631 7893 25338907897 76016723691 228050171073 22222222225669 66666666677007 200000000031021