64131532 has 6 divisors (see below), whose sum is σ = 112230188. Its totient is φ = 32065764.

The previous prime is 64131493. The next prime is 64131541. The reversal of 64131532 is 23513146.

64131532 is digitally balanced in base 2 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64131532² = 8225706793334048, which contains 22 as substring.

64131532 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 64131497 and 64131506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8016438 + ... + 8016445.

Almost surely, 2^64131532 is an apocalyptic number.

It is an amenable number.

64131532 is a deficient number, since it is larger than the sum of its proper divisors (48098656).

64131532 is a wasteful number, since it uses less digits than its factorization.

64131532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16032887 (or 16032885 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 64131532 is about 8008.2165305391. The cubic root of 64131532 is about 400.2738374898.

Adding to 64131532 its reverse (23513146), we get a palindrome (87644678).

The spelling of 64131532 in words is "sixty-four million, one hundred thirty-one thousand, five hundred thirty-two".