53981972 has 18 divisors (see below), whose sum is σ = 103838154. Its totient is φ = 24537040.

The previous prime is 53981957. The next prime is 53981999. The reversal of 53981972 is 27918935.

It can be written as a sum of positive squares in only one way, i.e., 30980356 + 23001616 = 5566^2 + 4796^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55283 + ... + 56250.

Almost surely, 2^53981972 is an apocalyptic number.

It is an amenable number.

53981972 is a deficient number, since it is larger than the sum of its proper divisors (49856182).

53981972 is a wasteful number, since it uses less digits than its factorization.

53981972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111559 (or 111546 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 53981972 is about 7347.2424759225. The cubic root of 53981972 is about 377.9342475891.

The spelling of 53981972 in words is "fifty-three million, nine hundred eighty-one thousand, nine hundred seventy-two".