55431121350 has 48 divisors (see below), whose sum is σ = 149966383680. Its totient is φ = 13437847200.

The previous prime is 55431121331. The next prime is 55431121363. The reversal of 55431121350 is 5312113455.

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, 16795660 + ... + 16798959.

It is an arithmetic number, because the mean of its divisors is an integer number (3124299660).

Almost surely, 2^55431121350 is an apocalyptic number.

55431121350 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55431121350 is an abundant number, since it is smaller than the sum of its proper divisors (94535262330).

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

55431121350 is a wasteful number, since it uses less digits than its factorization.

55431121350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33594645 (or 33594640 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 55431121350 in words is "fifty-five billion, four hundred thirty-one million, one hundred twenty-one thousand, three hundred fifty".