219979972 has 6 divisors (see below), whose sum is σ = 384964958. Its totient is φ = 109989984.

The previous prime is 219979933. The next prime is 219979997. The reversal of 219979972 is 279979912.

219979972 is digitally balanced in base 3, because in such base 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., 197852356 + 22127616 = 14066^2 + 4704^2 .

It is a super-2 number, since 2×219979972² = 96782376162241568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27497493 + ... + 27497500.

Almost surely, 2^219979972 is an apocalyptic number.

It is an amenable number.

219979972 is a deficient number, since it is larger than the sum of its proper divisors (164984986).

219979972 is a wasteful number, since it uses less digits than its factorization.

219979972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54994997 (or 54994995 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 55.

The square root of 219979972 is about 14831.7218150827. The cubic root of 219979972 is about 603.6627541473.

The spelling of 219979972 in words is "two hundred nineteen million, nine hundred seventy-nine thousand, nine hundred seventy-two".