213023740 has 24 divisors (see below), whose sum is σ = 456869952. Its totient is φ = 83396160.

The previous prime is 213023717. The next prime is 213023743. The reversal of 213023740 is 47320312.

It is a super-2 number, since 2×213023740² = 90758227607175200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213023743) 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, 112371 + ... + 114250.

It is an arithmetic number, because the mean of its divisors is an integer number (19036248).

Almost surely, 2^213023740 is an apocalyptic number.

213023740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213023740 is an abundant number, since it is smaller than the sum of its proper divisors (243846212).

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

213023740 is a wasteful number, since it uses less digits than its factorization.

213023740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226677 (or 226675 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 213023740 is about 14595.3328156641. The cubic root of 213023740 is about 597.2314485573.

The spelling of 213023740 in words is "two hundred thirteen million, twenty-three thousand, seven hundred forty".