265560251 has 4 divisors (see below), whose sum is σ = 289702104. Its totient is φ = 241418400.

The previous prime is 265560233. The next prime is 265560271. The reversal of 265560251 is 152065562.

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 265560251 - 2²² = 261365947 is a prime.

It is a super-2 number, since 2×265560251² = 141044493822366002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265560271) 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, 12070910 + ... + 12070931.

It is an arithmetic number, because the mean of its divisors is an integer number (72425526).

Almost surely, 2^265560251 is an apocalyptic number.

265560251 is a deficient number, since it is larger than the sum of its proper divisors (24141853).

265560251 is a wasteful number, since it uses less digits than its factorization.

265560251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24141852.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 265560251 is about 16296.0194832971. The cubic root of 265560251 is about 642.7681619183.

The spelling of 265560251 in words is "two hundred sixty-five million, five hundred sixty thousand, two hundred fifty-one".