213210531 has 12 divisors (see below), whose sum is σ = 309251800. Its totient is φ = 141549120.

The previous prime is 213210527. The next prime is 213210551. The reversal of 213210531 is 135012312.

213210531 is a `hidden beast` number, since 2 + 132 + 1 + 0 + 531 = 666.

It is not a de Polignac number, because 213210531 - 2² = 213210527 is a prime.

It is a super-2 number, since 2×213210531² = 90917461058603922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213210551) 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, 46981 + ... + 51318.

Almost surely, 2^213210531 is an apocalyptic number.

213210531 is a deficient number, since it is larger than the sum of its proper divisors (96041269).

213210531 is a wasteful number, since it uses less digits than its factorization.

213210531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98546 (or 98543 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 213210531 is about 14601.7304111533. The cubic root of 213210531 is about 597.4059594182.

Adding to 213210531 its reverse (135012312), we get a palindrome (348222843).

The spelling of 213210531 in words is "two hundred thirteen million, two hundred ten thousand, five hundred thirty-one".