53215432 has 16 divisors (see below), whose sum is σ = 99899100. Its totient is φ = 26575680.

The previous prime is 53215411. The next prime is 53215433. The reversal of 53215432 is 23451235.

It can be written as a sum of positive squares in 2 ways, for example, as 53202436 + 12996 = 7294^2 + 114^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53215397 and 53215406.

It is not an unprimeable number, because it can be changed into a prime (53215433) 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, 3994 + ... + 11062.

Almost surely, 2^53215432 is an apocalyptic number.

It is an amenable number.

53215432 is a deficient number, since it is larger than the sum of its proper divisors (46683668).

53215432 is a wasteful number, since it uses less digits than its factorization.

53215432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8016 (or 8012 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 53215432 is about 7294.8908148100. The cubic root of 53215432 is about 376.1368334028.

Adding to 53215432 its reverse (23451235), we get a palindrome (76666667).

The spelling of 53215432 in words is "fifty-three million, two hundred fifteen thousand, four hundred thirty-two".