575215981 has 2 divisors, whose sum is σ = 575215982. Its totient is φ = 575215980.

The previous prime is 575215933. The next prime is 575216011. The reversal of 575215981 is 189512575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447322500 + 127893481 = 21150^2 + 11309^2 .

It is a cyclic number.

It is not a de Polignac number, because 575215981 - 2⁷ = 575215853 is a prime.

It is a super-2 number, since 2×575215981² = 661746849595584722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (575215181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287607990 + 287607991.

It is an arithmetic number, because the mean of its divisors is an integer number (287607991).

Almost surely, 2^575215981 is an apocalyptic number.

It is an amenable number.

575215981 is a deficient number, since it is larger than the sum of its proper divisors (1).

575215981 is an equidigital number, since it uses as much as digits as its factorization.

575215981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 43.

The square root of 575215981 is about 23983.6607089076. The cubic root of 575215981 is about 831.6558519688.

The spelling of 575215981 in words is "five hundred seventy-five million, two hundred fifteen thousand, nine hundred eighty-one".