53131523 has 4 divisors (see below), whose sum is σ = 53333808. Its totient is φ = 52929240.

The previous prime is 53131483. The next prime is 53131553. The reversal of 53131523 is 32513135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32513135 = 5 ⋅6502627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53131523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53131553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100748 + ... + 101273.

It is an arithmetic number, because the mean of its divisors is an integer number (13333452).

Almost surely, 2^53131523 is an apocalyptic number.

53131523 is a deficient number, since it is larger than the sum of its proper divisors (202285).

53131523 is a wasteful number, since it uses less digits than its factorization.

53131523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202284.

The product of its digits is 1350, while the sum is 23.

The square root of 53131523 is about 7289.1373289299. The cubic root of 53131523 is about 375.9390344605.

Adding to 53131523 its reverse (32513135), we get a palindrome (85644658).

The spelling of 53131523 in words is "fifty-three million, one hundred thirty-one thousand, five hundred twenty-three".