53118865 has 16 divisors (see below), whose sum is σ = 67729680. Its totient is φ = 39916800.

The previous prime is 53118853. The next prime is 53118887. The reversal of 53118865 is 56881135.

It can be written as a sum of positive squares in 8 ways, for example, as 10504081 + 42614784 = 3241^2 + 6528^2 .

It is not a de Polignac number, because 53118865 - 2²¹ = 51021713 is a prime.

It is a super-2 number, since 2×53118865² = 5643227637776450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415 + ... + 10315.

It is an arithmetic number, because the mean of its divisors is an integer number (4233105).

Almost surely, 2^53118865 is an apocalyptic number.

It is an amenable number.

53118865 is a deficient number, since it is larger than the sum of its proper divisors (14610815).

53118865 is a wasteful number, since it uses less digits than its factorization.

53118865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9972.

The product of its digits is 28800, while the sum is 37.

The square root of 53118865 is about 7288.2689988776. The cubic root of 53118865 is about 375.9091776450.

The spelling of 53118865 in words is "fifty-three million, one hundred eighteen thousand, eight hundred sixty-five".