55031604 has 12 divisors (see below), whose sum is σ = 128407104. Its totient is φ = 18343864.

The previous prime is 55031597. The next prime is 55031609. The reversal of 55031604 is 40613055.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55031609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2292972 + ... + 2292995.

It is an arithmetic number, because the mean of its divisors is an integer number (10700592).

Almost surely, 2^55031604 is an apocalyptic number.

It is an amenable number.

55031604 is an abundant number, since it is smaller than the sum of its proper divisors (73375500).

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

55031604 is a wasteful number, since it uses less digits than its factorization.

55031604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585974 (or 4585972 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 55031604 is about 7418.3289223382. The cubic root of 55031604 is about 380.3680736495.

Adding to 55031604 its reverse (40613055), we get a palindrome (95644659).

The spelling of 55031604 in words is "fifty-five million, thirty-one thousand, six hundred four".