53033973521 has 4 divisors (see below), whose sum is σ = 53034592752. Its totient is φ = 53033354292.

The previous prime is 53033973511. The next prime is 53033973533. The reversal of 53033973521 is 12537933035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 53033973521 - 2⁶ = 53033973457 is a prime.

It is a super-2 number, since 2×53033973521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53033973511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155615 + ... + 360948.

It is an arithmetic number, because the mean of its divisors is an integer number (13258648188).

Almost surely, 2^53033973521 is an apocalyptic number.

It is an amenable number.

53033973521 is a deficient number, since it is larger than the sum of its proper divisors (619231).

53033973521 is a wasteful number, since it uses less digits than its factorization.

53033973521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619230.

The product of its (nonzero) digits is 255150, while the sum is 41.

The spelling of 53033973521 in words is "fifty-three billion, thirty-three million, nine hundred seventy-three thousand, five hundred twenty-one".