55731173 has 2 divisors, whose sum is σ = 55731174. Its totient is φ = 55731172.

The previous prime is 55731163. The next prime is 55731187. The reversal of 55731173 is 37113755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55681444 + 49729 = 7462^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 55731173 - 2⁴ = 55731157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55731133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27865586 + 27865587.

It is an arithmetic number, because the mean of its divisors is an integer number (27865587).

Almost surely, 2^55731173 is an apocalyptic number.

It is an amenable number.

55731173 is a deficient number, since it is larger than the sum of its proper divisors (1).

55731173 is an equidigital number, since it uses as much as digits as its factorization.

55731173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11025, while the sum is 32.

The square root of 55731173 is about 7465.3314059056. The cubic root of 55731173 is about 381.9730548504.

The spelling of 55731173 in words is "fifty-five million, seven hundred thirty-one thousand, one hundred seventy-three".