51515315324 has 24 divisors (see below), whose sum is σ = 98493609648. Its totient is φ = 23381245440.

The previous prime is 51515315309. The next prime is 51515315329. The reversal of 51515315324 is 42351351515.

It is a super-2 number, since 2×51515315324² (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 (51515315329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840227 + ... + 899450.

It is an arithmetic number, because the mean of its divisors is an integer number (4103900402).

Almost surely, 2^51515315324 is an apocalyptic number.

It is an amenable number.

51515315324 is a deficient number, since it is larger than the sum of its proper divisors (46978294324).

51515315324 is a wasteful number, since it uses less digits than its factorization.

51515315324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740365 (or 1740363 counting only the distinct ones).

The product of its digits is 45000, while the sum is 35.

Adding to 51515315324 its reverse (42351351515), we get a palindrome (93866666839).

The spelling of 51515315324 in words is "fifty-one billion, five hundred fifteen million, three hundred fifteen thousand, three hundred twenty-four".