257212086 has 16 divisors (see below), whose sum is σ = 528327984. Its totient is φ = 83420064.

The previous prime is 257212079. The next prime is 257212097. The reversal of 257212086 is 680212752.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579085 + ... + 579528.

It is an arithmetic number, because the mean of its divisors is an integer number (33020499).

Almost surely, 2^257212086 is an apocalyptic number.

257212086 is an abundant number, since it is smaller than the sum of its proper divisors (271115898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257212086 is a wasteful number, since it uses less digits than its factorization.

257212086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158655.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 257212086 is about 16037.8329583519. The cubic root of 257212086 is about 635.9609613711.

The spelling of 257212086 in words is "two hundred fifty-seven million, two hundred twelve thousand, eighty-six".