55532140 has 24 divisors (see below), whose sum is σ = 116862480. Its totient is φ = 22166208.

The previous prime is 55532137. The next prime is 55532159. The reversal of 55532140 is 4123555.

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, 7806 + ... + 13114.

It is an arithmetic number, because the mean of its divisors is an integer number (4869270).

Almost surely, 2^55532140 is an apocalyptic number.

It is an amenable number.

55532140 is an abundant number, since it is smaller than the sum of its proper divisors (61330340).

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

55532140 is a wasteful number, since it uses less digits than its factorization.

55532140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841 (or 5839 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55532140 is about 7451.9889962345. The cubic root of 55532140 is about 381.5177984112.

Adding to 55532140 its reverse (4123555), we get a palindrome (59655695).

The spelling of 55532140 in words is "fifty-five million, five hundred thirty-two thousand, one hundred forty".