51530391530 has 16 divisors (see below), whose sum is σ = 97636531680. Its totient is φ = 19527306192.

The previous prime is 51530391503. The next prime is 51530391533. The reversal of 51530391530 is 3519303515.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51530391533) 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, 135606104 + ... + 135606483.

It is an arithmetic number, because the mean of its divisors is an integer number (6102283230).

Almost surely, 2^51530391530 is an apocalyptic number.

51530391530 is a deficient number, since it is larger than the sum of its proper divisors (46106140150).

51530391530 is a wasteful number, since it uses less digits than its factorization.

51530391530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271212613.

The product of its (nonzero) digits is 30375, while the sum is 35.

The spelling of 51530391530 in words is "fifty-one billion, five hundred thirty million, three hundred ninety-one thousand, five hundred thirty".