51230432550 has 48 divisors (see below), whose sum is σ = 138601611072. Its totient is φ = 12419498400.

The previous prime is 51230432543. The next prime is 51230432563. The reversal of 51230432550 is 5523403215.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15522724 + ... + 15526023.

It is an arithmetic number, because the mean of its divisors is an integer number (2887533564).

Almost surely, 2^51230432550 is an apocalyptic number.

51230432550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51230432550 is an abundant number, since it is smaller than the sum of its proper divisors (87371178522).

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

51230432550 is a wasteful number, since it uses less digits than its factorization.

51230432550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31048773 (or 31048768 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 51230432550 its reverse (5523403215), we get a palindrome (56753835765).

The spelling of 51230432550 in words is "fifty-one billion, two hundred thirty million, four hundred thirty-two thousand, five hundred fifty".