5555557 has 8 divisors (see below), whose sum is σ = 6497216. Its totient is φ = 4650912.

The previous prime is 5555527. The next prime is 5555567. The reversal of 5555557 is 7555555.

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

It is a de Polignac number, because none of the positive numbers 2^k-5555557 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555507) 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, 8928 + ... + 9529.

It is an arithmetic number, because the mean of its divisors is an integer number (812152).

Almost surely, 2^5555557 is an apocalyptic number.

It is an amenable number.

5555557 is a deficient number, since it is larger than the sum of its proper divisors (941659).

5555557 is a wasteful number, since it uses less digits than its factorization.

5555557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18507.

The product of its digits is 109375, while the sum is 37.

The square root of 5555557 is about 2357.0229103681. The cubic root of 5555557 is about 177.1097768799.

The spelling of 5555557 in words is "five million, five hundred fifty-five thousand, five hundred fifty-seven".