216573572 has 12 divisors (see below), whose sum is σ = 384342336. Its totient is φ = 106761480.

The previous prime is 216573569. The next prime is 216573583. The reversal of 216573572 is 275375612.

It is a super-2 number, since 2×216573572² = 93808224177678368, which contains 22 as substring.

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, 381008 + ... + 381575.

It is an arithmetic number, because the mean of its divisors is an integer number (32028528).

Almost surely, 2^216573572 is an apocalyptic number.

It is an amenable number.

216573572 is a deficient number, since it is larger than the sum of its proper divisors (167768764).

216573572 is a wasteful number, since it uses less digits than its factorization.

216573572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762658 (or 762656 counting only the distinct ones).

The product of its digits is 88200, while the sum is 38.

The square root of 216573572 is about 14716.4388355335. The cubic root of 216573572 is about 600.5306157917.

The spelling of 216573572 in words is "two hundred sixteen million, five hundred seventy-three thousand, five hundred seventy-two".