53318832021 has 144 divisors (see below), whose sum is σ = 98783053824. Its totient is φ = 27461161728.

The previous prime is 53318831999. The next prime is 53318832029. The reversal of 53318832021 is 12023881335.

It is a happy number.

53318832021 is a `hidden beast` number, since 533 + 1 + 8 + 83 + 20 + 21 = 666.

53318832021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53318832021 - 2⁶ = 53318831957 is a prime.

It is a super-2 number, since 2×53318832021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53318832029) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 48781551 + ... + 48782643.

Almost surely, 2^53318832021 is an apocalyptic number.

It is an amenable number.

53318832021 is a deficient number, since it is larger than the sum of its proper divisors (45464221803).

53318832021 is a wasteful number, since it uses less digits than its factorization.

53318832021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 53318832021 in words is "fifty-three billion, three hundred eighteen million, eight hundred thirty-two thousand, twenty-one".