55387330 has 16 divisors (see below), whose sum is σ = 100416960. Its totient is φ = 21994992.

The previous prime is 55387307. The next prime is 55387331. The reversal of 55387330 is 3378355.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55387331) 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, 18534 + ... + 21313.

It is an arithmetic number, because the mean of its divisors is an integer number (6276060).

Almost surely, 2^55387330 is an apocalyptic number.

55387330 is a deficient number, since it is larger than the sum of its proper divisors (45029630).

55387330 is a wasteful number, since it uses less digits than its factorization.

55387330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39993.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 55387330 is about 7442.2664558587. The cubic root of 55387330 is about 381.1858844076.

The spelling of 55387330 in words is "fifty-five million, three hundred eighty-seven thousand, three hundred thirty".