51513115430 has 32 divisors (see below), whose sum is σ = 108132494400. Its totient is φ = 17661638400.

The previous prime is 51513115421. The next prime is 51513115481. The reversal of 51513115430 is 3451131515.

It is a super-2 number, since 2×51513115430² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51513115393 and 51513115402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7505771 + ... + 7512630.

It is an arithmetic number, because the mean of its divisors is an integer number (3379140450).

Almost surely, 2^51513115430 is an apocalyptic number.

51513115430 is an abundant number, since it is smaller than the sum of its proper divisors (56619378970).

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

51513115430 is a wasteful number, since it uses less digits than its factorization.

51513115430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15018429 (or 15018415 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

Adding to 51513115430 its reverse (3451131515), we get a palindrome (54964246945).

The spelling of 51513115430 in words is "fifty-one billion, five hundred thirteen million, one hundred fifteen thousand, four hundred thirty".