257764231 has 4 divisors (see below), whose sum is σ = 263758792. Its totient is φ = 251769672.

The previous prime is 257764207. The next prime is 257764249. The reversal of 257764231 is 132467752.

It is a happy number.

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 257764231 - 2¹³ = 257756039 is a prime.

It is a super-2 number, since 2×257764231² = 132884797566042722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257764271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2997216 + ... + 2997301.

It is an arithmetic number, because the mean of its divisors is an integer number (65939698).

Almost surely, 2^257764231 is an apocalyptic number.

257764231 is a deficient number, since it is larger than the sum of its proper divisors (5994561).

257764231 is an equidigital number, since it uses as much as digits as its factorization.

257764231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994560.

The product of its digits is 70560, while the sum is 37.

The square root of 257764231 is about 16055.0375583491. The cubic root of 257764231 is about 636.4156985612.

The spelling of 257764231 in words is "two hundred fifty-seven million, seven hundred sixty-four thousand, two hundred thirty-one".