64513232 has 80 divisors (see below), whose sum is σ = 156275712. Its totient is φ = 25159680.

The previous prime is 64513219. The next prime is 64513247. The reversal of 64513232 is 23231546.

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, 58478 + ... + 59570.

Almost surely, 2^64513232 is an apocalyptic number.

64513232 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64513232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78137856).

64513232 is an abundant number, since it is smaller than the sum of its proper divisors (91762480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64513232 is a wasteful number, since it uses less digits than its factorization.

64513232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1150 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 64513232 is about 8032.0129481967. The cubic root of 64513232 is about 401.0663878493.

Adding to 64513232 its reverse (23231546), we get a palindrome (87744778).

The spelling of 64513232 in words is "sixty-four million, five hundred thirteen thousand, two hundred thirty-two".