55851972 has 24 divisors (see below), whose sum is σ = 142168992. Its totient is φ = 16924800.

The previous prime is 55851949. The next prime is 55851977. The reversal of 55851972 is 27915855.

55851972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55851977) 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 7 ways as a sum of consecutive naturals, for example, 211429 + ... + 211692.

It is an arithmetic number, because the mean of its divisors is an integer number (5923708).

Almost surely, 2^55851972 is an apocalyptic number.

It is an amenable number.

55851972 is an abundant number, since it is smaller than the sum of its proper divisors (86317020).

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

55851972 is a wasteful number, since it uses less digits than its factorization.

55851972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423139 (or 423137 counting only the distinct ones).

The product of its digits is 126000, while the sum is 42.

The square root of 55851972 is about 7473.4176920603. The cubic root of 55851972 is about 382.2488350684.

It can be divided in two parts, 5585 and 1972, that added together give a palindrome (7557).

The spelling of 55851972 in words is "fifty-five million, eight hundred fifty-one thousand, nine hundred seventy-two".