51241025520 has 160 divisors (see below), whose sum is σ = 185786323200. Its totient is φ = 12945090816.

The previous prime is 51241025509. The next prime is 51241025531. The reversal of 51241025520 is 2552014215.

51241025520 is a `hidden beast` number, since 5 + 1 + 2 + 4 + 102 + 552 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51241025509) and next prime (51241025531).

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 31 ways as a sum of consecutive naturals, for example, 583242 + ... + 665321.

It is an arithmetic number, because the mean of its divisors is an integer number (1161164520).

Almost surely, 2^51241025520 is an apocalyptic number.

It is an amenable number.

51241025520 is an abundant number, since it is smaller than the sum of its proper divisors (134545297680).

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

51241025520 is a wasteful number, since it uses less digits than its factorization.

51241025520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248604 (or 1248592 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 51241025520 its reverse (2552014215), we get a palindrome (53793039735).

The spelling of 51241025520 in words is "fifty-one billion, two hundred forty-one million, twenty-five thousand, five hundred twenty".