213957772 has 24 divisors (see below), whose sum is σ = 428246784. Its totient is φ = 91625232.

The previous prime is 213957769. The next prime is 213957773. The reversal of 213957772 is 277759312.

It is not an unprimeable number, because it can be changed into a prime (213957773) 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, 51393 + ... + 55399.

It is an arithmetic number, because the mean of its divisors is an integer number (17843616).

Almost surely, 2^213957772 is an apocalyptic number.

It is an amenable number.

213957772 is an abundant number, since it is smaller than the sum of its proper divisors (214289012).

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

213957772 is a wasteful number, since it uses less digits than its factorization.

213957772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5925 (or 5923 counting only the distinct ones).

The product of its digits is 185220, while the sum is 43.

The square root of 213957772 is about 14627.2954437927. The cubic root of 213957772 is about 598.1030571482.

The spelling of 213957772 in words is "two hundred thirteen million, nine hundred fifty-seven thousand, seven hundred seventy-two".