51293197830 has 32 divisors (see below), whose sum is σ = 140689914624. Its totient is φ = 11724159456.

The previous prime is 51293197817. The next prime is 51293197841. The reversal of 51293197830 is 3879139215.

It is a self number, because there is not a number n which added to its sum of digits gives 51293197830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122126452 + ... + 122126871.

It is an arithmetic number, because the mean of its divisors is an integer number (4396559832).

Almost surely, 2^51293197830 is an apocalyptic number.

51293197830 is an abundant number, since it is smaller than the sum of its proper divisors (89396716794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51293197830 is a wasteful number, since it uses less digits than its factorization.

51293197830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244253340.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 51293197830 in words is "fifty-one billion, two hundred ninety-three million, one hundred ninety-seven thousand, eight hundred thirty".