213531984 has 40 divisors (see below), whose sum is σ = 612917120. Its totient is φ = 71177184.

The previous prime is 213531979. The next prime is 213531991. The reversal of 213531984 is 489135312.

213531984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent 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, 246712 + ... + 247575.

It is an arithmetic number, because the mean of its divisors is an integer number (15322928).

Almost surely, 2^213531984 is an apocalyptic number.

213531984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

213531984 is an abundant number, since it is smaller than the sum of its proper divisors (399385136).

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

213531984 is a wasteful number, since it uses less digits than its factorization.

213531984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494304 (or 494292 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 213531984 is about 14612.7336251640. The cubic root of 213531984 is about 597.7060407622.

The spelling of 213531984 in words is "two hundred thirteen million, five hundred thirty-one thousand, nine hundred eighty-four".