213772816 has 10 divisors (see below), whose sum is σ = 414184862. Its totient is φ = 106886400.

The previous prime is 213772799. The next prime is 213772831. The reversal of 213772816 is 618277312.

213772816 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 179667216 + 34105600 = 13404^2 + 5840^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6680385 + ... + 6680416.

Almost surely, 2^213772816 is an apocalyptic number.

It is an amenable number.

213772816 is a deficient number, since it is larger than the sum of its proper divisors (200412046).

213772816 is a wasteful number, since it uses less digits than its factorization.

213772816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360809 (or 13360803 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 213772816 is about 14620.9717871282. The cubic root of 213772816 is about 597.9306638774.

The spelling of 213772816 in words is "two hundred thirteen million, seven hundred seventy-two thousand, eight hundred sixteen".