55249770 has 16 divisors (see below), whose sum is σ = 132599520. Its totient is φ = 14733264.

The previous prime is 55249751. The next prime is 55249787. The reversal of 55249770 is 7794255.

55249770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 920800 + ... + 920859.

It is an arithmetic number, because the mean of its divisors is an integer number (8287470).

Almost surely, 2^55249770 is an apocalyptic number.

55249770 is an abundant number, since it is smaller than the sum of its proper divisors (77349750).

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

55249770 is a wasteful number, since it uses less digits than its factorization.

55249770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841669.

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 55249770 is about 7433.0189021689. The cubic root of 55249770 is about 380.8700516457.

The spelling of 55249770 in words is "fifty-five million, two hundred forty-nine thousand, seven hundred seventy".