51011420525 has 36 divisors (see below), whose sum is σ = 68667240060. Its totient is φ = 37574784000.

The previous prime is 51011420497. The next prime is 51011420539. The reversal of 51011420525 is 52502411015.

It can be written as a sum of positive squares in 18 ways, for example, as 38324326756 + 12687093769 = 195766^2 + 112637^2 .

It is not a de Polignac number, because 51011420525 - 2²⁶ = 50944311661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51011420494 and 51011420503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1679171 + ... + 1709279.

It is an arithmetic number, because the mean of its divisors is an integer number (1907423335).

Almost surely, 2^51011420525 is an apocalyptic number.

It is an amenable number.

51011420525 is a deficient number, since it is larger than the sum of its proper divisors (17655819535).

51011420525 is a wasteful number, since it uses less digits than its factorization.

51011420525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30546 (or 30528 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 51011420525 in words is "fifty-one billion, eleven million, four hundred twenty thousand, five hundred twenty-five".