556198031 has 2 divisors, whose sum is σ = 556198032. Its totient is φ = 556198030.

The previous prime is 556198007. The next prime is 556198033. The reversal of 556198031 is 130891655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556198031 is a prime.

It is a super-2 number, since 2×556198031² = 618712499376553922, which contains 22 as substring.

Together with 556198033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556198033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278099015 + 278099016.

It is an arithmetic number, because the mean of its divisors is an integer number (278099016).

Almost surely, 2^556198031 is an apocalyptic number.

556198031 is a deficient number, since it is larger than the sum of its proper divisors (1).

556198031 is an equidigital number, since it uses as much as digits as its factorization.

556198031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 556198031 is about 23583.8510638106. The cubic root of 556198031 is about 822.3874655028.

The spelling of 556198031 in words is "five hundred fifty-six million, one hundred ninety-eight thousand, thirty-one".