557148731 has 2 divisors, whose sum is σ = 557148732. Its totient is φ = 557148730.

The previous prime is 557148727. The next prime is 557148737. The reversal of 557148731 is 137841755.

It is a happy number.

557148731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557148731 - 2² = 557148727 is a prime.

It is a super-2 number, since 2×557148731² = 620829416909820722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (557148737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278574365 + 278574366.

It is an arithmetic number, because the mean of its divisors is an integer number (278574366).

Almost surely, 2^557148731 is an apocalyptic number.

557148731 is a deficient number, since it is larger than the sum of its proper divisors (1).

557148731 is an equidigital number, since it uses as much as digits as its factorization.

557148731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 41.

The square root of 557148731 is about 23603.9981994577. The cubic root of 557148731 is about 822.8557631704.

The spelling of 557148731 in words is "five hundred fifty-seven million, one hundred forty-eight thousand, seven hundred thirty-one".