55063920 has 40 divisors (see below), whose sum is σ = 170698896. Its totient is φ = 14683648.

The previous prime is 55063889. The next prime is 55063961. The reversal of 55063920 is 2936055.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114477 + ... + 114956.

Almost surely, 2^55063920 is an apocalyptic number.

It is an amenable number.

55063920 is an abundant number, since it is smaller than the sum of its proper divisors (115634976).

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

55063920 is a wasteful number, since it uses less digits than its factorization.

55063920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229449 (or 229443 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 55063920 is about 7420.5067212422. The cubic root of 55063920 is about 380.4425131140.

Adding to 55063920 its reverse (2936055), we get a palindrome (57999975).

The spelling of 55063920 in words is "fifty-five million, sixty-three thousand, nine hundred twenty".