51513121030 has 32 divisors (see below), whose sum is σ = 112203372096. Its totient is φ = 16622721024.

The previous prime is 51513120977. The next prime is 51513121039. The reversal of 51513121030 is 3012131515.

It is a junction number, because it is equal to n+sod(n) for n = 51513120992 and 51513121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51513121039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21642979 + ... + 21645358.

It is an arithmetic number, because the mean of its divisors is an integer number (3506355378).

Almost surely, 2^51513121030 is an apocalyptic number.

51513121030 is an abundant number, since it is smaller than the sum of its proper divisors (60690251066).

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

51513121030 is a wasteful number, since it uses less digits than its factorization.

51513121030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43288368.

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 51513121030 its reverse (3012131515), we get a palindrome (54525252545).

The spelling of 51513121030 in words is "fifty-one billion, five hundred thirteen million, one hundred twenty-one thousand, thirty".