55405131000 has 64 divisors (see below), whose sum is σ = 172864018080. Its totient is φ = 14774700800.

The previous prime is 55405130999. The next prime is 55405131037. The reversal of 55405131000 is 13150455.

It is a super-2 number, since 2×55405131000² (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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9231189 + ... + 9237188.

Almost surely, 2^55405131000 is an apocalyptic number.

55405131000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55405131000 is an abundant number, since it is smaller than the sum of its proper divisors (117458887080).

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

55405131000 is a wasteful number, since it uses less digits than its factorization.

55405131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18468401 (or 18468387 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 55405131000 its reverse (13150455), we get a palindrome (55418281455).

The spelling of 55405131000 in words is "fifty-five billion, four hundred five million, one hundred thirty-one thousand".