213531156 has 36 divisors (see below), whose sum is σ = 542336704. Its totient is φ = 70837200.

The previous prime is 213531133. The next prime is 213531161. The reversal of 213531156 is 651135312.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6460 + ... + 21651.

Almost surely, 2^213531156 is an apocalyptic number.

It is an amenable number.

213531156 is an abundant number, since it is smaller than the sum of its proper divisors (328805548).

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

213531156 is a wasteful number, since it uses less digits than its factorization.

213531156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28332 (or 28327 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 213531156 is about 14612.7052936819. The cubic root of 213531156 is about 597.7052681984.

Adding to 213531156 its reverse (651135312), we get a palindrome (864666468).

The spelling of 213531156 in words is "two hundred thirteen million, five hundred thirty-one thousand, one hundred fifty-six".