257226065 has 48 divisors (see below), whose sum is σ = 350044416. Its totient is φ = 180702720.

The previous prime is 257226061. The next prime is 257226071. The reversal of 257226065 is 560622752.

It is not a de Polignac number, because 257226065 - 2² = 257226061 is a prime.

It is a super-4 number, since 4×257226065⁴ (a number of 35 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (257226061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3839162 + ... + 3839228.

It is an arithmetic number, because the mean of its divisors is an integer number (7292592).

Almost surely, 2^257226065 is an apocalyptic number.

It is an amenable number.

257226065 is a deficient number, since it is larger than the sum of its proper divisors (92818351).

257226065 is a wasteful number, since it uses less digits than its factorization.

257226065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 257226065 is about 16038.2687656742. The cubic root of 257226065 is about 635.9724822621.

The spelling of 257226065 in words is "two hundred fifty-seven million, two hundred twenty-six thousand, sixty-five".