162181972 has 24 divisors (see below), whose sum is σ = 303284520. Its totient is φ = 75617280.

The previous prime is 162181969. The next prime is 162181991. The reversal of 162181972 is 279181261.

162181972 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 4 ways, for example, as 13439556 + 148742416 = 3666^2 + 12196^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529 + ... + 18352.

It is an arithmetic number, because the mean of its divisors is an integer number (12636855).

Almost surely, 2^162181972 is an apocalyptic number.

It is an amenable number.

162181972 is a deficient number, since it is larger than the sum of its proper divisors (141102548).

162181972 is a wasteful number, since it uses less digits than its factorization.

162181972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22011 (or 22009 counting only the distinct ones).

The product of its digits is 12096, while the sum is 37.

The square root of 162181972 is about 12735.0685903139. The cubic root of 162181972 is about 545.3402157110.

The spelling of 162181972 in words is "one hundred sixty-two million, one hundred eighty-one thousand, nine hundred seventy-two".