54139972 has 6 divisors (see below), whose sum is σ = 94744958. Its totient is φ = 27069984.

The previous prime is 54139937. The next prime is 54140011. The reversal of 54139972 is 27993145.

It can be written as a sum of positive squares in only one way, i.e., 31539456 + 22600516 = 5616^2 + 4754^2 .

It is a super-2 number, since 2×54139972² = 5862273136321568, 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, 6767493 + ... + 6767500.

Almost surely, 2^54139972 is an apocalyptic number.

It is an amenable number.

54139972 is a deficient number, since it is larger than the sum of its proper divisors (40604986).

54139972 is a wasteful number, since it uses less digits than its factorization.

54139972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13534997 (or 13534995 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 54139972 is about 7357.9869529648. The cubic root of 54139972 is about 378.3026140691.

The spelling of 54139972 in words is "fifty-four million, one hundred thirty-nine thousand, nine hundred seventy-two".