2157000210 has 24 divisors (see below), whose sum is σ = 5608200780. Its totient is φ = 575200032.

The previous prime is 2157000169. The next prime is 2157000217. The reversal of 2157000210 is 120007512.

It can be written as a sum of positive squares in 2 ways, for example, as 2156952249 + 47961 = 46443^2 + 219^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2157000217) 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, 11983245 + ... + 11983424.

Almost surely, 2^2157000210 is an apocalyptic number.

2157000210 is an abundant number, since it is smaller than the sum of its proper divisors (3451200570).

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

2157000210 is a wasteful number, since it uses less digits than its factorization.

2157000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23966682 (or 23966679 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2157000210 is about 46443.5163397433. The cubic root of 2157000210 is about 1292.0621245931.

Adding to 2157000210 its reverse (120007512), we get a palindrome (2277007722).

The spelling of 2157000210 in words is "two billion, one hundred fifty-seven million, two hundred ten", and thus it is an aban number.