257150521451 has 4 divisors (see below), whose sum is σ = 257151914712. Its totient is φ = 257149128192.

The previous prime is 257150521447. The next prime is 257150521457. The reversal of 257150521451 is 154125051752.

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 257150521451 - 2² = 257150521447 is a prime.

It is a super-2 number, since 2×257150521451² (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 (257150521457) 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, 368150 + ... + 806123.

It is an arithmetic number, because the mean of its divisors is an integer number (64287978678).

Almost surely, 2^257150521451 is an apocalyptic number.

257150521451 is a deficient number, since it is larger than the sum of its proper divisors (1393261).

257150521451 is a wasteful number, since it uses less digits than its factorization.

257150521451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393260.

The product of its (nonzero) digits is 70000, while the sum is 38.

The spelling of 257150521451 in words is "two hundred fifty-seven billion, one hundred fifty million, five hundred twenty-one thousand, four hundred fifty-one".