53121210251 has 8 divisors (see below), whose sum is σ = 55551079584. Its totient is φ = 50701361920.

The previous prime is 53121210229. The next prime is 53121210283. The reversal of 53121210251 is 15201212135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53121210251 - 2⁶ = 53121210187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53121240251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2494406 + ... + 2515611.

It is an arithmetic number, because the mean of its divisors is an integer number (6943884948).

Almost surely, 2^53121210251 is an apocalyptic number.

53121210251 is a deficient number, since it is larger than the sum of its proper divisors (2429869333).

53121210251 is a wasteful number, since it uses less digits than its factorization.

53121210251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010501.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 53121210251 its reverse (15201212135), we get a palindrome (68322422386).

The spelling of 53121210251 in words is "fifty-three billion, one hundred twenty-one million, two hundred ten thousand, two hundred fifty-one".