53243121015 has 256 divisors, whose sum is σ = 120766464000. Its totient is φ = 21683718144.

The previous prime is 53243120993. The next prime is 53243121059. The reversal of 53243121015 is 51012134235.

53243121015 is a `hidden beast` number, since 5 + 3 + 2 + 431 + 210 + 15 = 666.

It is not a de Polignac number, because 53243121015 - 2⁹ = 53243120503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 53243121015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 38057286 + ... + 38058684.

It is an arithmetic number, because the mean of its divisors is an integer number (471744000).

Almost surely, 2^53243121015 is an apocalyptic number.

53243121015 is an abundant number, since it is smaller than the sum of its proper divisors (67523342985).

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

53243121015 is a wasteful number, since it uses less digits than its factorization.

53243121015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 53243121015 in words is "fifty-three billion, two hundred forty-three million, one hundred twenty-one thousand, fifteen".