51291805430 has 16 divisors (see below), whose sum is σ = 92731973040. Its totient is φ = 20426339232.

The previous prime is 51291805427. The next prime is 51291805457. The reversal of 51291805430 is 3450819215.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11295485 + ... + 11300024.

It is an arithmetic number, because the mean of its divisors is an integer number (5795748315).

Almost surely, 2^51291805430 is an apocalyptic number.

51291805430 is a deficient number, since it is larger than the sum of its proper divisors (41440167610).

51291805430 is a wasteful number, since it uses less digits than its factorization.

51291805430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22595743.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 51291805430 in words is "fifty-one billion, two hundred ninety-one million, eight hundred five thousand, four hundred thirty".