63520131 has 4 divisors (see below), whose sum is σ = 84693512. Its totient is φ = 42346752.

The previous prime is 63520123. The next prime is 63520133. The reversal of 63520131 is 13102536.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 63520131 - 2³ = 63520123 is a prime.

It is a super-2 number, since 2×63520131² = 8069614084514322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63520098 and 63520107.

It is not an unprimeable number, because it can be changed into a prime (63520133) 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, 10586686 + ... + 10586691.

It is an arithmetic number, because the mean of its divisors is an integer number (21173378).

Almost surely, 2^63520131 is an apocalyptic number.

63520131 is a deficient number, since it is larger than the sum of its proper divisors (21173381).

63520131 is a wasteful number, since it uses less digits than its factorization.

63520131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21173380.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 63520131 is about 7969.9517564412. The cubic root of 63520131 is about 398.9977638206.

Adding to 63520131 its reverse (13102536), we get a palindrome (76622667).

The spelling of 63520131 in words is "sixty-three million, five hundred twenty thousand, one hundred thirty-one".