55420772 has 12 divisors (see below), whose sum is σ = 105803376. Its totient is φ = 25191240.

The previous prime is 55420759. The next prime is 55420789. The reversal of 55420772 is 27702455.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629738 + ... + 629825.

It is an arithmetic number, because the mean of its divisors is an integer number (8816948).

Almost surely, 2^55420772 is an apocalyptic number.

It is an amenable number.

55420772 is a deficient number, since it is larger than the sum of its proper divisors (50382604).

55420772 is a wasteful number, since it uses less digits than its factorization.

55420772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259578 (or 1259576 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 55420772 is about 7444.5128786241. The cubic root of 55420772 is about 381.2625869893.

The spelling of 55420772 in words is "fifty-five million, four hundred twenty thousand, seven hundred seventy-two".