213031130 has 16 divisors (see below), whose sum is σ = 412952904. Its totient is φ = 78657600.

The previous prime is 213031069. The next prime is 213031153. The reversal of 213031130 is 31130312.

213031130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 186022321 + 27008809 = 13639^2 + 5197^2 .

It is a Curzon 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, 819221 + ... + 819480.

Almost surely, 2^213031130 is an apocalyptic number.

213031130 is a deficient number, since it is larger than the sum of its proper divisors (199921774).

213031130 is a wasteful number, since it uses less digits than its factorization.

213031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638721.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 213031130 is about 14595.5859765889. The cubic root of 213031130 is about 597.2383546567.

Adding to 213031130 its reverse (31130312), we get a palindrome (244161442).

The spelling of 213031130 in words is "two hundred thirteen million, thirty-one thousand, one hundred thirty".