213540984 has 24 divisors (see below), whose sum is σ = 578340360. Its totient is φ = 71180304.

The previous prime is 213540953. The next prime is 213540991. The reversal of 213540984 is 489045312.

213540984 is a `hidden beast` number, since 21 + 3 + 540 + 98 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1482852 + ... + 1482995.

It is an arithmetic number, because the mean of its divisors is an integer number (24097515).

Almost surely, 2^213540984 is an apocalyptic number.

213540984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

213540984 is an abundant number, since it is smaller than the sum of its proper divisors (364799376).

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

213540984 is a wasteful number, since it uses less digits than its factorization.

213540984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965859 (or 2965852 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 213540984 is about 14613.0415725132. The cubic root of 213540984 is about 597.7144380660.

The spelling of 213540984 in words is "two hundred thirteen million, five hundred forty thousand, nine hundred eighty-four".