557520427 has 2 divisors, whose sum is σ = 557520428. Its totient is φ = 557520426.

The previous prime is 557520377. The next prime is 557520433. The reversal of 557520427 is 724025755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-557520427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (557520497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278760213 + 278760214.

It is an arithmetic number, because the mean of its divisors is an integer number (278760214).

Almost surely, 2^557520427 is an apocalyptic number.

557520427 is a deficient number, since it is larger than the sum of its proper divisors (1).

557520427 is an equidigital number, since it uses as much as digits as its factorization.

557520427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98000, while the sum is 37.

The square root of 557520427 is about 23611.8704680506. The cubic root of 557520427 is about 823.0387090569.

The spelling of 557520427 in words is "five hundred fifty-seven million, five hundred twenty thousand, four hundred twenty-seven".