210399157 has 16 divisors (see below), whose sum is σ = 225892800. Its totient is φ = 195275520.

The previous prime is 210399149. The next prime is 210399173. The reversal of 210399157 is 751993012.

It is a cyclic number.

It is not a de Polignac number, because 210399157 - 2³ = 210399149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210399457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 635482 + ... + 635812.

It is an arithmetic number, because the mean of its divisors is an integer number (14118300).

Almost surely, 2^210399157 is an apocalyptic number.

It is an amenable number.

210399157 is a deficient number, since it is larger than the sum of its proper divisors (15493643).

210399157 is a wasteful number, since it uses less digits than its factorization.

210399157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 210399157 is about 14505.1424329443. The cubic root of 210399157 is about 594.7685534396.

The spelling of 210399157 in words is "two hundred ten million, three hundred ninety-nine thousand, one hundred fifty-seven".