213957620 has 12 divisors (see below), whose sum is σ = 449311044. Its totient is φ = 85583040.

The previous prime is 213957619. The next prime is 213957701. The reversal of 213957620 is 26759312.

It can be written as a sum of positive squares in 2 ways, for example, as 33431524 + 180526096 = 5782^2 + 13436^2 .

It is a congruent number.

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, 5348921 + ... + 5348960.

It is an arithmetic number, because the mean of its divisors is an integer number (37442587).

Almost surely, 2^213957620 is an apocalyptic number.

213957620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213957620 is an abundant number, since it is smaller than the sum of its proper divisors (235353424).

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

213957620 is a wasteful number, since it uses less digits than its factorization.

213957620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10697890 (or 10697888 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 213957620 is about 14627.2902480261. The cubic root of 213957620 is about 598.1029155132.

The spelling of 213957620 in words is "two hundred thirteen million, nine hundred fifty-seven thousand, six hundred twenty".