167220972 has 18 divisors (see below), whose sum is σ = 422697548. Its totient is φ = 55740312.

The previous prime is 167220917. The next prime is 167220979. The reversal of 167220972 is 279022761.

167220972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4645027 = 167220972 / (1 + 6 + 7 + 2 + 2 + 0 + 9 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (167220979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2322478 + ... + 2322549.

Almost surely, 2^167220972 is an apocalyptic number.

167220972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

167220972 is an abundant number, since it is smaller than the sum of its proper divisors (255476576).

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

167220972 is a wasteful number, since it uses less digits than its factorization.

167220972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645037 (or 4645032 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 167220972 is about 12931.3948203587. The cubic root of 167220972 is about 550.9306250030.

The spelling of 167220972 in words is "one hundred sixty-seven million, two hundred twenty thousand, nine hundred seventy-two".