51515234342 has 32 divisors (see below), whose sum is σ = 91875893760. Its totient is φ = 21354354720.

The previous prime is 51515234341. The next prime is 51515234369. The reversal of 51515234342 is 24343251515.

51515234342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51515234342² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515234341) 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, 1061342 + ... + 1108817.

It is an arithmetic number, because the mean of its divisors is an integer number (2871121680).

Almost surely, 2^51515234342 is an apocalyptic number.

51515234342 is a deficient number, since it is larger than the sum of its proper divisors (40360659418).

51515234342 is a wasteful number, since it uses less digits than its factorization.

51515234342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170268.

The product of its digits is 72000, while the sum is 35.

Adding to 51515234342 its reverse (24343251515), we get a palindrome (75858485857).

The spelling of 51515234342 in words is "fifty-one billion, five hundred fifteen million, two hundred thirty-four thousand, three hundred forty-two".