51521114502 has 160 divisors (see below), whose sum is σ = 135940654080. Its totient is φ = 14378316480.

The previous prime is 51521114483. The next prime is 51521114543. The reversal of 51521114502 is 20541112515.

It is a happy number.

51521114502 is a `hidden beast` number, since 5 + 152 + 1 + 1 + 1 + 4 + 502 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11094193 + ... + 11098835.

It is an arithmetic number, because the mean of its divisors is an integer number (849629088).

Almost surely, 2^51521114502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51521114502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67970327040).

51521114502 is an abundant number, since it is smaller than the sum of its proper divisors (84419539578).

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

51521114502 is a wasteful number, since it uses less digits than its factorization.

51521114502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160 (or 5151 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 51521114502 in words is "fifty-one billion, five hundred twenty-one million, one hundred fourteen thousand, five hundred two".