63131523 has 64 divisors (see below), whose sum is σ = 111992832. Its totient is φ = 30689280.

The previous prime is 63131503. The next prime is 63131539. The reversal of 63131523 is 32513136.

It is a happy number.

It is not a de Polignac number, because 63131523 - 2⁵ = 63131491 is a prime.

Its product of digits (1620) is a multiple of the sum of its prime divisors (324).

It is a junction number, because it is equal to n+sod(n) for n = 63131493 and 63131502.

It is not an unprimeable number, because it can be changed into a prime (63131503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 282990 + ... + 283212.

It is an arithmetic number, because the mean of its divisors is an integer number (1749888).

Almost surely, 2^63131523 is an apocalyptic number.

63131523 is a deficient number, since it is larger than the sum of its proper divisors (48861309).

63131523 is a wasteful number, since it uses less digits than its factorization.

63131523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324.

The product of its digits is 1620, while the sum is 24.

The square root of 63131523 is about 7945.5347837638. The cubic root of 63131523 is about 398.1824264924.

Adding to 63131523 its reverse (32513136), we get a palindrome (95644659).

The spelling of 63131523 in words is "sixty-three million, one hundred thirty-one thousand, five hundred twenty-three".