257131724353 has 4 divisors (see below), whose sum is σ = 293864827840. Its totient is φ = 220398620868.

The previous prime is 257131724273. The next prime is 257131724359. The reversal of 257131724353 is 353427131752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257131724353 - 2³⁷ = 119692770881 is a prime.

It is a super-2 number, since 2×257131724353² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257131724359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18366551733 + ... + 18366551746.

It is an arithmetic number, because the mean of its divisors is an integer number (73466206960).

Almost surely, 2^257131724353 is an apocalyptic number.

It is an amenable number.

257131724353 is a deficient number, since it is larger than the sum of its proper divisors (36733103487).

257131724353 is an equidigital number, since it uses as much as digits as its factorization.

257131724353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36733103486.

The product of its digits is 529200, while the sum is 43.

The spelling of 257131724353 in words is "two hundred fifty-seven billion, one hundred thirty-one million, seven hundred twenty-four thousand, three hundred fifty-three".