257364381 has 8 divisors (see below), whose sum is σ = 344018464. Its totient is φ = 171143280.

The previous prime is 257364379. The next prime is 257364389. The reversal of 257364381 is 183463752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257364381 - 2¹ = 257364379 is a prime.

It is a super-2 number, since 2×257364381² = 132472849215026322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257364389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106855 + ... + 109236.

It is an arithmetic number, because the mean of its divisors is an integer number (43002308).

Almost surely, 2^257364381 is an apocalyptic number.

It is an amenable number.

257364381 is a deficient number, since it is larger than the sum of its proper divisors (86654083).

257364381 is a wasteful number, since it uses less digits than its factorization.

257364381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216491.

The product of its digits is 120960, while the sum is 39.

The square root of 257364381 is about 16042.5802475786. The cubic root of 257364381 is about 636.0864538738.

The spelling of 257364381 in words is "two hundred fifty-seven million, three hundred sixty-four thousand, three hundred eighty-one".