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30260008081 = 123817244393
BaseRepresentation
bin11100001011101000…
…110001010010010001
32220002212112200102001
4130023220301102101
5443433030224311
621522400554001
72120604552622
oct341350612221
986085480361
1030260008081
1111918a92a46
125a46022901
132b131ccc34
141670baba49
15bc18884c1
hex70ba31491

30260008081 has 4 divisors (see below), whose sum is σ = 30260376292. Its totient is φ = 30259639872.

The previous prime is 30260008067. The next prime is 30260008091. The reversal of 30260008081 is 18080006203.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7832250000 + 22427758081 = 88500^2 + 149759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-30260008081 is a prime.

It is a super-2 number, since 2×302600080812 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30260008061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1621 + ... + 246013.

It is an arithmetic number, because the mean of its divisors is an integer number (7565094073).

Almost surely, 230260008081 is an apocalyptic number.

It is an amenable number.

30260008081 is a deficient number, since it is larger than the sum of its proper divisors (368211).

30260008081 is a wasteful number, since it uses less digits than its factorization.

30260008081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368210.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 30260008081 in words is "thirty billion, two hundred sixty million, eight thousand, eighty-one".

Divisors: 1 123817 244393 30260008081