55521770 has 32 divisors (see below), whose sum is σ = 104775552. Its totient is φ = 21143232.

The previous prime is 55521751. The next prime is 55521811. The reversal of 55521770 is 7712555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64664 + ... + 65516.

It is an arithmetic number, because the mean of its divisors is an integer number (3274236).

Almost surely, 2^55521770 is an apocalyptic number.

55521770 is a deficient number, since it is larger than the sum of its proper divisors (49253782).

55521770 is a wasteful number, since it uses less digits than its factorization.

55521770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166.

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

The square root of 55521770 is about 7451.2931763554. The cubic root of 55521770 is about 381.4940488861.

The spelling of 55521770 in words is "fifty-five million, five hundred twenty-one thousand, seven hundred seventy".