556121263 has 2 divisors, whose sum is σ = 556121264. Its totient is φ = 556121262.

The previous prime is 556121243. The next prime is 556121287. The reversal of 556121263 is 362121655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556121263 - 2⁵ = 556121231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556121243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278060631 + 278060632.

It is an arithmetic number, because the mean of its divisors is an integer number (278060632).

Almost surely, 2^556121263 is an apocalyptic number.

556121263 is a deficient number, since it is larger than the sum of its proper divisors (1).

556121263 is an equidigital number, since it uses as much as digits as its factorization.

556121263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 556121263 is about 23582.2234532709. The cubic root of 556121263 is about 822.3496276931.

The spelling of 556121263 in words is "five hundred fifty-six million, one hundred twenty-one thousand, two hundred sixty-three".