210164865 has 32 divisors (see below), whose sum is σ = 346368000. Its totient is φ = 108755136.

The previous prime is 210164861. The next prime is 210164873. The reversal of 210164865 is 568461012.

It is not a de Polignac number, because 210164865 - 2² = 210164861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210164861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104136 + ... + 106134.

It is an arithmetic number, because the mean of its divisors is an integer number (10824000).

Almost surely, 2^210164865 is an apocalyptic number.

It is an amenable number.

210164865 is a deficient number, since it is larger than the sum of its proper divisors (136203135).

210164865 is a wasteful number, since it uses less digits than its factorization.

210164865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 210164865 is about 14497.0640131028. The cubic root of 210164865 is about 594.5477013656.

It can be divided in two parts, 2101 and 64865, that added together give a palindrome (66966).

The spelling of 210164865 in words is "two hundred ten million, one hundred sixty-four thousand, eight hundred sixty-five".