265220655 has 64 divisors (see below), whose sum is σ = 530178048. Its totient is φ = 110407680.

The previous prime is 265220611. The next prime is 265220693. The reversal of 265220655 is 556022562.

It is not a de Polignac number, because 265220655 - 2¹¹ = 265218607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52939 + ... + 57731.

It is an arithmetic number, because the mean of its divisors is an integer number (8284032).

Almost surely, 2^265220655 is an apocalyptic number.

265220655 is a deficient number, since it is larger than the sum of its proper divisors (264957393).

265220655 is a wasteful number, since it uses less digits than its factorization.

265220655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4856.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 265220655 is about 16285.5965503263. The cubic root of 265220655 is about 642.4940563779.

The spelling of 265220655 in words is "two hundred sixty-five million, two hundred twenty thousand, six hundred fifty-five".