55105572 has 12 divisors (see below), whose sum is σ = 128579696. Its totient is φ = 18368520.

The previous prime is 55105571. The next prime is 55105591. The reversal of 55105572 is 27550155.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55105571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2296054 + ... + 2296077.

Almost surely, 2^55105572 is an apocalyptic number.

It is an amenable number.

55105572 is an abundant number, since it is smaller than the sum of its proper divisors (73474124).

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

55105572 is a wasteful number, since it uses less digits than its factorization.

55105572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592138 (or 4592136 counting only the distinct ones).

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 55105572 is about 7423.3127375856. The cubic root of 55105572 is about 380.5384149781.

The spelling of 55105572 in words is "fifty-five million, one hundred five thousand, five hundred seventy-two".