55597172 has 6 divisors (see below), whose sum is σ = 97295058. Its totient is φ = 27798584.

The previous prime is 55597133. The next prime is 55597177. The reversal of 55597172 is 27179555.

It can be written as a sum of positive squares in only one way, i.e., 44009956 + 11587216 = 6634^2 + 3404^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55597177) 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 as a sum of consecutive naturals, namely, 6949643 + ... + 6949650.

It is an arithmetic number, because the mean of its divisors is an integer number (16215843).

Almost surely, 2^55597172 is an apocalyptic number.

It is an amenable number.

55597172 is a deficient number, since it is larger than the sum of its proper divisors (41697886).

55597172 is a wasteful number, since it uses less digits than its factorization.

55597172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13899297 (or 13899295 counting only the distinct ones).

The product of its digits is 110250, while the sum is 41.

The square root of 55597172 is about 7456.3511183420. The cubic root of 55597172 is about 381.6666682769. Note that the first 5 decimals are identical.

The spelling of 55597172 in words is "fifty-five million, five hundred ninety-seven thousand, one hundred seventy-two".