53111978 has 16 divisors (see below), whose sum is σ = 84520584. Its totient is φ = 24944640.

The previous prime is 53111969. The next prime is 53111987. The reversal of 53111978 is 87911135.

53111978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53111969) and next prime (53111987).

It can be written as a sum of positive squares in 4 ways, for example, as 49603849 + 3508129 = 7043^2 + 1873^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20576 + ... + 23012.

Almost surely, 2^53111978 is an apocalyptic number.

53111978 is a deficient number, since it is larger than the sum of its proper divisors (31408606).

53111978 is a wasteful number, since it uses less digits than its factorization.

53111978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097.

The product of its digits is 7560, while the sum is 35.

The square root of 53111978 is about 7287.7965119781. The cubic root of 53111978 is about 375.8929310730.

The spelling of 53111978 in words is "fifty-three million, one hundred eleven thousand, nine hundred seventy-eight".