210973257 has 12 divisors (see below), whose sum is σ = 332442864. Its totient is φ = 127862520.

The previous prime is 210973241. The next prime is 210973307. The reversal of 210973257 is 752379012.

It is not a de Polignac number, because 210973257 - 2⁴ = 210973241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210973657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1065423 + ... + 1065620.

It is an arithmetic number, because the mean of its divisors is an integer number (27703572).

Almost surely, 2^210973257 is an apocalyptic number.

It is an amenable number.

210973257 is a deficient number, since it is larger than the sum of its proper divisors (121469607).

210973257 is a wasteful number, since it uses less digits than its factorization.

210973257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131060 (or 2131057 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 210973257 is about 14524.9184851413. The cubic root of 210973257 is about 595.3090285577.

The spelling of 210973257 in words is "two hundred ten million, nine hundred seventy-three thousand, two hundred fifty-seven".