51630556243 has 32 divisors (see below), whose sum is σ = 64689546240. Its totient is φ = 40217627520.

The previous prime is 51630556199. The next prime is 51630556253. The reversal of 51630556243 is 34265503615.

It is not a de Polignac number, because 51630556243 - 2⁹ = 51630555731 is a prime.

It is a super-4 number, since 4×51630556243⁴ (a number of 44 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51630556196 and 51630556205.

It is not an unprimeable number, because it can be changed into a prime (51630556253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275505 + ... + 423277.

It is an arithmetic number, because the mean of its divisors is an integer number (2021548320).

Almost surely, 2^51630556243 is an apocalyptic number.

51630556243 is a deficient number, since it is larger than the sum of its proper divisors (13058989997).

51630556243 is a wasteful number, since it uses less digits than its factorization.

51630556243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147907.

The product of its (nonzero) digits is 324000, while the sum is 40.

The spelling of 51630556243 in words is "fifty-one billion, six hundred thirty million, five hundred fifty-six thousand, two hundred forty-three".