51515023324 has 12 divisors (see below), whose sum is σ = 90623288448. Its totient is φ = 25622655200.

The previous prime is 51515023321. The next prime is 51515023333. The reversal of 51515023324 is 42332051515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515023321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33713257 + ... + 33714784.

It is an arithmetic number, because the mean of its divisors is an integer number (7551940704).

Almost surely, 2^51515023324 is an apocalyptic number.

It is an amenable number.

51515023324 is a deficient number, since it is larger than the sum of its proper divisors (39108265124).

51515023324 is a wasteful number, since it uses less digits than its factorization.

51515023324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67428236 (or 67428234 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 51515023324 its reverse (42332051515), we get a palindrome (93847074839).

The spelling of 51515023324 in words is "fifty-one billion, five hundred fifteen million, twenty-three thousand, three hundred twenty-four".