265255551 has 12 divisors (see below), whose sum is σ = 417978600. Its totient is φ = 160760880.

The previous prime is 265255517. The next prime is 265255559. The reversal of 265255551 is 155552562.

265255551 is a `hidden beast` number, since 2 + 6 + 52 + 55 + 551 = 666.

It is not a de Polignac number, because 265255551 - 2¹⁰ = 265254527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265255559) 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, 1339576 + ... + 1339773.

It is an arithmetic number, because the mean of its divisors is an integer number (34831550).

Almost surely, 2^265255551 is an apocalyptic number.

265255551 is a deficient number, since it is larger than the sum of its proper divisors (152723049).

265255551 is a wasteful number, since it uses less digits than its factorization.

265255551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679366 (or 2679363 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 265255551 is about 16286.6678912539. The cubic root of 265255551 is about 642.5222335314.

The spelling of 265255551 in words is "two hundred sixty-five million, two hundred fifty-five thousand, five hundred fifty-one".