55031057 has 8 divisors (see below), whose sum is σ = 58338792. Its totient is φ = 51731200.

The previous prime is 55031047. The next prime is 55031069. The reversal of 55031057 is 75013055.

55031057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21864976 + 33166081 = 4676^2 + 5759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55031057 - 2²⁴ = 38253841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55031017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18707 + ... + 21447.

It is an arithmetic number, because the mean of its divisors is an integer number (7292349).

Almost surely, 2^55031057 is an apocalyptic number.

It is an amenable number.

55031057 is a deficient number, since it is larger than the sum of its proper divisors (3307735).

55031057 is a wasteful number, since it uses less digits than its factorization.

55031057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939.

The product of its (nonzero) digits is 2625, while the sum is 26.

The square root of 55031057 is about 7418.2920541052. The cubic root of 55031057 is about 380.3668133917.

The spelling of 55031057 in words is "fifty-five million, thirty-one thousand, fifty-seven".