55190720 has 56 divisors (see below), whose sum is σ = 141543024. Its totient is φ = 20376576.

The previous prime is 55190699. The next prime is 55190753. The reversal of 55190720 is 2709155.

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, 2474 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (2527554).

Almost surely, 2^55190720 is an apocalyptic number.

It is an amenable number.

55190720 is an abundant number, since it is smaller than the sum of its proper divisors (86352304).

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

55190720 is a wasteful number, since it uses less digits than its factorization.

55190720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13297 (or 13287 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 55190720 is about 7429.0456991460. The cubic root of 55190720 is about 380.7343141651.

Adding to 55190720 its reverse (2709155), we get a palindrome (57899875).

The spelling of 55190720 in words is "fifty-five million, one hundred ninety thousand, seven hundred twenty".