55123431000 has 128 divisors (see below), whose sum is σ = 187620226560. Its totient is φ = 13363248000.

The previous prime is 55123430987. The next prime is 55123431001. The reversal of 55123431000 is 13432155.

It is a super-2 number, since 2×55123431000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123431001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 802204 + ... + 868203.

It is an arithmetic number, because the mean of its divisors is an integer number (1465783020).

Almost surely, 2^55123431000 is an apocalyptic number.

55123431000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55123431000 is an abundant number, since it is smaller than the sum of its proper divisors (132496795560).

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

55123431000 is a wasteful number, since it uses less digits than its factorization.

55123431000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670442 (or 1670428 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 55123431000 its reverse (13432155), we get a palindrome (55136863155).

The spelling of 55123431000 in words is "fifty-five billion, one hundred twenty-three million, four hundred thirty-one thousand".