51213103525 has 24 divisors (see below), whose sum is σ = 66438604800. Its totient is φ = 39086667840.

The previous prime is 51213103511. The next prime is 51213103541. The reversal of 51213103525 is 52530131215.

It is not a de Polignac number, because 51213103525 - 2¹³ = 51213095333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51213103493 and 51213103502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103951 + ... + 336499.

It is an arithmetic number, because the mean of its divisors is an integer number (2768275200).

Almost surely, 2^51213103525 is an apocalyptic number.

It is an amenable number.

51213103525 is a deficient number, since it is larger than the sum of its proper divisors (15225501275).

51213103525 is a wasteful number, since it uses less digits than its factorization.

51213103525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232965 (or 232960 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 51213103525 in words is "fifty-one billion, two hundred thirteen million, one hundred three thousand, five hundred twenty-five".