51512255130 has 128 divisors (see below), whose sum is σ = 143840655360. Its totient is φ = 11562174720.

The previous prime is 51512255129. The next prime is 51512255131. The reversal of 51512255130 is 3155221515.

It is an interprime number because it is at equal distance from previous prime (51512255129) and next prime (51512255131).

It is a super-2 number, since 2×51512255130² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (51512255131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16192140 + ... + 16195320.

It is an arithmetic number, because the mean of its divisors is an integer number (1123755120).

Almost surely, 2^51512255130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51512255130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71920327680).

51512255130 is an abundant number, since it is smaller than the sum of its proper divisors (92328400230).

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

51512255130 is a wasteful number, since it uses less digits than its factorization.

51512255130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564.

The product of its (nonzero) digits is 7500, while the sum is 30.

Adding to 51512255130 its reverse (3155221515), we get a palindrome (54667476645).

The spelling of 51512255130 in words is "fifty-one billion, five hundred twelve million, two hundred fifty-five thousand, one hundred thirty".