257156341 has 8 divisors (see below), whose sum is σ = 277348064. Its totient is φ = 237023280.

The previous prime is 257156329. The next prime is 257156351. The reversal of 257156341 is 143651752.

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

It is a de Polignac number, because none of the positive numbers 2^k-257156341 is a prime.

It is a super-2 number, since 2×257156341² = 132258767433016562, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257156297 and 257156306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257156321) 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, 5331 + ... + 23296.

It is an arithmetic number, because the mean of its divisors is an integer number (34668508).

Almost surely, 2^257156341 is an apocalyptic number.

It is an amenable number.

257156341 is a deficient number, since it is larger than the sum of its proper divisors (20191723).

257156341 is a wasteful number, since it uses less digits than its factorization.

257156341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29331.

The product of its digits is 25200, while the sum is 34.

The square root of 257156341 is about 16036.0949423480. The cubic root of 257156341 is about 635.9150145861.

The spelling of 257156341 in words is "two hundred fifty-seven million, one hundred fifty-six thousand, three hundred forty-one".