55531340 has 24 divisors (see below), whose sum is σ = 117234432. Its totient is φ = 22094720.

The previous prime is 55531321. The next prime is 55531351. The reversal of 55531340 is 4313555.

55531340 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

55531340 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3449 + ... + 11088.

It is an arithmetic number, because the mean of its divisors is an integer number (4884768).

Almost surely, 2^55531340 is an apocalyptic number.

It is an amenable number.

55531340 is an abundant number, since it is smaller than the sum of its proper divisors (61703092).

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

55531340 is a wasteful number, since it uses less digits than its factorization.

55531340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14737 (or 14735 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 55531340 is about 7451.9353190966. The cubic root of 55531340 is about 381.5159663448.

Adding to 55531340 its reverse (4313555), we get a palindrome (59844895).

The spelling of 55531340 in words is "fifty-five million, five hundred thirty-one thousand, three hundred forty".