257220522371 has 8 divisors (see below), whose sum is σ = 272364395040. Its totient is φ = 242078122368.

The previous prime is 257220522353. The next prime is 257220522397. The reversal of 257220522371 is 173225022752.

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

It is a cyclic number.

It is not a de Polignac number, because 257220522371 - 2¹⁰ = 257220521347 is a prime.

It is a super-2 number, since 2×257220522371² (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 (257220522301) 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, 2090 + ... + 717248.

It is an arithmetic number, because the mean of its divisors is an integer number (34045549380).

Almost surely, 2^257220522371 is an apocalyptic number.

257220522371 is a deficient number, since it is larger than the sum of its proper divisors (15143872669).

257220522371 is a wasteful number, since it uses less digits than its factorization.

257220522371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736333.

The product of its (nonzero) digits is 117600, while the sum is 38.

The spelling of 257220522371 in words is "two hundred fifty-seven billion, two hundred twenty million, five hundred twenty-two thousand, three hundred seventy-one".