331425257 has 4 divisors (see below), whose sum is σ = 331566720. Its totient is φ = 331283796.

The previous prime is 331425233. The next prime is 331425287. The reversal of 331425257 is 752524133.

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 331425257 - 2⁸ = 331425001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331425287) 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, 67157 + ... + 71922.

It is an arithmetic number, because the mean of its divisors is an integer number (82891680).

Almost surely, 2^331425257 is an apocalyptic number.

It is an amenable number.

331425257 is a deficient number, since it is larger than the sum of its proper divisors (141463).

331425257 is a wasteful number, since it uses less digits than its factorization.

331425257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141462.

The product of its digits is 25200, while the sum is 32.

The square root of 331425257 is about 18205.0887666059. The cubic root of 331425257 is about 692.0357556953.

The spelling of 331425257 in words is "three hundred thirty-one million, four hundred twenty-five thousand, two hundred fifty-seven".