213772940 has 12 divisors (see below), whose sum is σ = 448923216. Its totient is φ = 85509168.

The previous prime is 213772921. The next prime is 213772957. The reversal of 213772940 is 49277312.

It is a self number, because there is not a number n which added to its sum of digits gives 213772940.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5344304 + ... + 5344343.

It is an arithmetic number, because the mean of its divisors is an integer number (37410268).

Almost surely, 2^213772940 is an apocalyptic number.

213772940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213772940 is an abundant number, since it is smaller than the sum of its proper divisors (235150276).

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

213772940 is a wasteful number, since it uses less digits than its factorization.

213772940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10688656 (or 10688654 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 213772940 is about 14620.9760276118. The cubic root of 213772940 is about 597.9307794883.

The spelling of 213772940 in words is "two hundred thirteen million, seven hundred seventy-two thousand, nine hundred forty".