351271220265 has 32 divisors (see below), whose sum is σ = 713693909760. Its totient is φ = 160581128832.

The previous prime is 351271220257. The next prime is 351271220317. The reversal of 351271220265 is 562022172153.

351271220265 is a `hidden beast` number, since 351 + 27 + 1 + 2 + 20 + 265 = 666.

It is not a de Polignac number, because 351271220265 - 2³ = 351271220257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185856844 + ... + 185858733.

It is an arithmetic number, because the mean of its divisors is an integer number (22302934680).

Almost surely, 2^351271220265 is an apocalyptic number.

351271220265 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

351271220265 is an abundant number, since it is smaller than the sum of its proper divisors (362422689495).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

351271220265 is a wasteful number, since it uses less digits than its factorization.

351271220265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371715598 (or 371715592 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

It can be divided in two parts, 351271 and 220265, that added together give a square (571536 = 756²).

The spelling of 351271220265 in words is "three hundred fifty-one billion, two hundred seventy-one million, two hundred twenty thousand, two hundred sixty-five".