55131424000 has 72 divisors (see below), whose sum is σ = 137339348328. Its totient is φ = 22052556800.

The previous prime is 55131423989. The next prime is 55131424001. The reversal of 55131424000 is 42413155.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3576996864 + 51554427136 = 59808^2 + 227056^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55131424001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829429 + ... + 893428.

It is an arithmetic number, because the mean of its divisors is an integer number (1907490949).

Almost surely, 2^55131424000 is an apocalyptic number.

55131424000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55131424000 is an abundant number, since it is smaller than the sum of its proper divisors (82207924328).

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

55131424000 is an equidigital number, since it uses as much as digits as its factorization.

55131424000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722888 (or 1722864 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 55131424000 its reverse (42413155), we get a palindrome (55173837155).

The spelling of 55131424000 in words is "fifty-five billion, one hundred thirty-one million, four hundred twenty-four thousand".