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201283139 = 917321943
BaseRepresentation
bin10111111111101…
…01011001000011
3112000202020120002
423333311121003
5403012030024
631550110215
74662610211
oct1377653103
9460666502
10201283139
11a368a002
12574ab36b
1332916365
141ca37cb1
1512a0e6ae
hexbff5643

201283139 has 4 divisors (see below), whose sum is σ = 201314256. Its totient is φ = 201252024.

The previous prime is 201283133. The next prime is 201283163. The reversal of 201283139 is 931382102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201283139 - 28 = 201282883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201283133) 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, 1799 + ... + 20144.

It is an arithmetic number, because the mean of its divisors is an integer number (50328564).

Almost surely, 2201283139 is an apocalyptic number.

201283139 is a deficient number, since it is larger than the sum of its proper divisors (31117).

201283139 is an equidigital number, since it uses as much as digits as its factorization.

201283139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31116.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 201283139 is about 14187.4289073109. The cubic root of 201283139 is about 586.0515229580.

The spelling of 201283139 in words is "two hundred one million, two hundred eighty-three thousand, one hundred thirty-nine".

Divisors: 1 9173 21943 201283139