55331664 has 40 divisors (see below), whose sum is σ = 144907392. Its totient is φ = 18190080.

The previous prime is 55331663. The next prime is 55331671. The reversal of 55331664 is 46613355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55331663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4392 + ... + 11399.

Almost surely, 2^55331664 is an apocalyptic number.

It is an amenable number.

55331664 is an abundant number, since it is smaller than the sum of its proper divisors (89575728).

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

55331664 is a wasteful number, since it uses less digits than its factorization.

55331664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15875 (or 15869 counting only the distinct ones).

The product of its digits is 32400, while the sum is 33.

The square root of 55331664 is about 7438.5256603711. The cubic root of 55331664 is about 381.0581403548.

The spelling of 55331664 in words is "fifty-five million, three hundred thirty-one thousand, six hundred sixty-four".