55100440 has 32 divisors (see below), whose sum is σ = 124195680. Its totient is φ = 22001152.

The previous prime is 55100429. The next prime is 55100453. The reversal of 55100440 is 4400155.

It is a congruent number.

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, 34704 + ... + 36256.

It is an arithmetic number, because the mean of its divisors is an integer number (3881115).

Almost surely, 2^55100440 is an apocalyptic number.

It is an amenable number.

55100440 is an abundant number, since it is smaller than the sum of its proper divisors (69095240).

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

55100440 is a wasteful number, since it uses less digits than its factorization.

55100440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 55100440 is about 7422.9670617618. The cubic root of 55100440 is about 380.5266013889.

Adding to 55100440 its reverse (4400155), we get a palindrome (59500595).

The spelling of 55100440 in words is "fifty-five million, one hundred thousand, four hundred forty".