556145251 has 2 divisors, whose sum is σ = 556145252. Its totient is φ = 556145250.

The previous prime is 556145203. The next prime is 556145263. The reversal of 556145251 is 152541655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556145251 - 2⁹ = 556144739 is a prime.

It is not a weakly prime, because it can be changed into another prime (556145651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278072625 + 278072626.

It is an arithmetic number, because the mean of its divisors is an integer number (278072626).

Almost surely, 2^556145251 is an apocalyptic number.

556145251 is a deficient number, since it is larger than the sum of its proper divisors (1).

556145251 is an equidigital number, since it uses as much as digits as its factorization.

556145251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30000, while the sum is 34.

The square root of 556145251 is about 23582.7320512277. The cubic root of 556145251 is about 822.3614513969.

The spelling of 556145251 in words is "five hundred fifty-six million, one hundred forty-five thousand, two hundred fifty-one".