53121695 has 16 divisors (see below), whose sum is σ = 70187040. Its totient is φ = 38275200.

The previous prime is 53121689. The next prime is 53121709. The reversal of 53121695 is 59612135.

It is a de Polignac number, because none of the positive numbers 2^k-53121695 is a prime.

It is a congruent number.

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, 1565 + ... + 10425.

It is an arithmetic number, because the mean of its divisors is an integer number (4386690).

Almost surely, 2^53121695 is an apocalyptic number.

53121695 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53121695 is a deficient number, since it is larger than the sum of its proper divisors (17065345).

53121695 is a wasteful number, since it uses less digits than its factorization.

53121695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8986.

The product of its digits is 8100, while the sum is 32.

The square root of 53121695 is about 7288.4631439008. The cubic root of 53121695 is about 375.9158532650.

It can be divided in two parts, 5312 and 1695, that added together give a palindrome (7007).

The spelling of 53121695 in words is "fifty-three million, one hundred twenty-one thousand, six hundred ninety-five".