557731145 has 4 divisors (see below), whose sum is σ = 669277380. Its totient is φ = 446184912.

The previous prime is 557731133. The next prime is 557731157. The reversal of 557731145 is 541137755.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (557731133) and next prime (557731157).

It can be written as a sum of positive squares in 2 ways, for example, as 62980096 + 494751049 = 7936^2 + 22243^2 .

It is a cyclic number.

It is not a de Polignac number, because 557731145 - 2²⁰ = 556682569 is a prime.

It is a super-2 number, since 2×557731145² = 622128060206022050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 557731099 and 557731108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55773110 + ... + 55773119.

It is an arithmetic number, because the mean of its divisors is an integer number (167319345).

Almost surely, 2^557731145 is an apocalyptic number.

It is an amenable number.

557731145 is a deficient number, since it is larger than the sum of its proper divisors (111546235).

557731145 is a wasteful number, since it uses less digits than its factorization.

557731145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111546234.

The product of its digits is 73500, while the sum is 38.

The square root of 557731145 is about 23616.3321665325. The cubic root of 557731145 is about 823.1423867085.

The spelling of 557731145 in words is "five hundred fifty-seven million, seven hundred thirty-one thousand, one hundred forty-five".