213020988 has 24 divisors (see below), whose sum is σ = 510483792. Its totient is φ = 69087744.

The previous prime is 213020987. The next prime is 213020993. The reversal of 213020988 is 889020312.

213020988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213020988² = 90755882656992288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213020981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239445 + ... + 240332.

It is an arithmetic number, because the mean of its divisors is an integer number (21270158).

Almost surely, 2^213020988 is an apocalyptic number.

It is an amenable number.

213020988 is an abundant number, since it is smaller than the sum of its proper divisors (297462804).

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

213020988 is a wasteful number, since it uses less digits than its factorization.

213020988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479821 (or 479819 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 213020988 is about 14595.2385386468. The cubic root of 213020988 is about 597.2288767187.

The spelling of 213020988 in words is "two hundred thirteen million, twenty thousand, nine hundred eighty-eight".