251226265 has 16 divisors (see below), whose sum is σ = 318294720. Its totient is φ = 189829440.

The previous prime is 251226259. The next prime is 251226271. The reversal of 251226265 is 562622152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (251226259) and next prime (251226271).

It is not a de Polignac number, because 251226265 - 2³ = 251226257 is a prime.

It is a super-2 number, since 2×251226265² = 126229272451700450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29155 + ... + 36775.

It is an arithmetic number, because the mean of its divisors is an integer number (19893420).

Almost surely, 2^251226265 is an apocalyptic number.

It is an amenable number.

251226265 is a deficient number, since it is larger than the sum of its proper divisors (67068455).

251226265 is a wasteful number, since it uses less digits than its factorization.

251226265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7992.

The product of its digits is 14400, while the sum is 31.

The square root of 251226265 is about 15850.1187692711. The cubic root of 251226265 is about 630.9888435117.

The spelling of 251226265 in words is "two hundred fifty-one million, two hundred twenty-six thousand, two hundred sixty-five".