51630230155513 has 24 divisors (see below), whose sum is σ = 55287489281024. Its totient is φ = 48202094304000.

The previous prime is 51630230155499. The next prime is 51630230155529. The reversal of 51630230155513 is 31555103203615.

It is a de Polignac number, because none of the positive numbers 2^k-51630230155513 is a prime.

It is a super-2 number, since 2×51630230155513² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51630230155583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214629043 + ... + 214869463.

Almost surely, 2^{51630230155513} is an apocalyptic number.

It is an amenable number.

51630230155513 is a deficient number, since it is larger than the sum of its proper divisors (3657259125511).

51630230155513 is a wasteful number, since it uses less digits than its factorization.

51630230155513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246433 (or 246416 counting only the distinct ones).

The product of its (nonzero) digits is 202500, while the sum is 40.

The spelling of 51630230155513 in words is "fifty-one trillion, six hundred thirty billion, two hundred thirty million, one hundred fifty-five thousand, five hundred thirteen".