55105772 has 12 divisors (see below), whose sum is σ = 102107880. Its totient is φ = 25932096.

The previous prime is 55105759. The next prime is 55105777. The reversal of 55105772 is 27750155.

55105772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55105772² = 6073292215431968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55105777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405122 + ... + 405257.

It is an arithmetic number, because the mean of its divisors is an integer number (8508990).

Almost surely, 2^55105772 is an apocalyptic number.

It is an amenable number.

55105772 is a deficient number, since it is larger than the sum of its proper divisors (47002108).

55105772 is a wasteful number, since it uses less digits than its factorization.

55105772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810400 (or 810398 counting only the distinct ones).

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 55105772 is about 7423.3262086480. The cubic root of 55105772 is about 380.5388753526.

The spelling of 55105772 in words is "fifty-five million, one hundred five thousand, seven hundred seventy-two".