53215638 has 32 divisors (see below), whose sum is σ = 125832960. Its totient is φ = 14679840.

The previous prime is 53215597. The next prime is 53215649. The reversal of 53215638 is 83651235.

It is a junction number, because it is equal to n+sod(n) for n = 53215599 and 53215608.

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, 20628 + ... + 23063.

It is an arithmetic number, because the mean of its divisors is an integer number (3932280).

Almost surely, 2^53215638 is an apocalyptic number.

53215638 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

53215638 is an abundant number, since it is smaller than the sum of its proper divisors (72617322).

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

53215638 is a wasteful number, since it uses less digits than its factorization.

53215638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43732.

The product of its digits is 21600, while the sum is 33.

The square root of 53215638 is about 7294.9049342675. The cubic root of 53215638 is about 376.1373187513.

The spelling of 53215638 in words is "fifty-three million, two hundred fifteen thousand, six hundred thirty-eight".