51325501021 has 8 divisors (see below), whose sum is σ = 54030844800. Its totient is φ = 48620557440.

The previous prime is 51325501001. The next prime is 51325501033. The reversal of 51325501021 is 12010552315.

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

It is a cyclic number.

It is not a de Polignac number, because 51325501021 - 2⁹ = 51325500509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51325501001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183900 + ... + 369418.

It is an arithmetic number, because the mean of its divisors is an integer number (6753855600).

Almost surely, 2^51325501021 is an apocalyptic number.

It is an amenable number.

51325501021 is a deficient number, since it is larger than the sum of its proper divisors (2705343779).

51325501021 is a wasteful number, since it uses less digits than its factorization.

51325501021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200099.

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 51325501021 in words is "fifty-one billion, three hundred twenty-five million, five hundred one thousand, twenty-one".