55019720 has 32 divisors (see below), whose sum is σ = 141480000. Its totient is φ = 18863808.

The previous prime is 55019717. The next prime is 55019729. The reversal of 55019720 is 2791055.

It is not an unprimeable number, because it can be changed into a prime (55019729) by changing a digit.

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, 97970 + ... + 98529.

It is an arithmetic number, because the mean of its divisors is an integer number (4421250).

Almost surely, 2^55019720 is an apocalyptic number.

It is an amenable number.

55019720 is an abundant number, since it is smaller than the sum of its proper divisors (86460280).

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

55019720 is a wasteful number, since it uses less digits than its factorization.

55019720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196517 (or 196513 counting only the distinct ones).

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

The square root of 55019720 is about 7417.5278900723. The cubic root of 55019720 is about 380.3406916891.

The spelling of 55019720 in words is "fifty-five million, nineteen thousand, seven hundred twenty".