53015501997 has 32 divisors (see below), whose sum is σ = 83193989760. Its totient is φ = 33251662080.

The previous prime is 53015501939. The next prime is 53015502037. The reversal of 53015501997 is 79910551035.

53015501997 is a `hidden beast` number, since 5 + 3 + 0 + 1 + 550 + 1 + 9 + 97 = 666.

It is not a de Polignac number, because 53015501997 - 2¹⁰ = 53015500973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53015500997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1232383 + ... + 1274675.

It is an arithmetic number, because the mean of its divisors is an integer number (2599812180).

Almost surely, 2^53015501997 is an apocalyptic number.

It is an amenable number.

53015501997 is a deficient number, since it is larger than the sum of its proper divisors (30178487763).

53015501997 is a wasteful number, since it uses less digits than its factorization.

53015501997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45050 (or 45044 counting only the distinct ones).

The product of its (nonzero) digits is 212625, while the sum is 45.

The spelling of 53015501997 in words is "fifty-three billion, fifteen million, five hundred one thousand, nine hundred ninety-seven".