257032533157 has 4 divisors (see below), whose sum is σ = 257076923776. Its totient is φ = 256988142540.

The previous prime is 257032533143. The next prime is 257032533193. The reversal of 257032533157 is 751335230752.

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 257032533157 - 2²³ = 257024144549 is a prime.

It is a super-2 number, since 2×257032533157² (a number of 24 digits) 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 (257032533137) 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, 22186623 + ... + 22198204.

It is an arithmetic number, because the mean of its divisors is an integer number (64269230944).

Almost surely, 2^257032533157 is an apocalyptic number.

It is an amenable number.

257032533157 is a deficient number, since it is larger than the sum of its proper divisors (44390619).

257032533157 is an equidigital number, since it uses as much as digits as its factorization.

257032533157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44390618.

The product of its (nonzero) digits is 661500, while the sum is 43.

The spelling of 257032533157 in words is "two hundred fifty-seven billion, thirty-two million, five hundred thirty-three thousand, one hundred fifty-seven".