53621316 has 72 divisors (see below), whose sum is σ = 155588160. Its totient is φ = 15253056.

The previous prime is 53621297. The next prime is 53621327. The reversal of 53621316 is 61312635.

53621316 is a `hidden beast` number, since 5 + 3 + 621 + 31 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 53621316.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97755 + ... + 98301.

Almost surely, 2^53621316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53621316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77794080).

53621316 is an abundant number, since it is smaller than the sum of its proper divisors (101966844).

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

53621316 is a wasteful number, since it uses less digits than its factorization.

53621316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 948 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 53621316 is about 7322.6577142456. The cubic root of 53621316 is about 377.0907009241.

The spelling of 53621316 in words is "fifty-three million, six hundred twenty-one thousand, three hundred sixteen".