42231577 has 2 divisors, whose sum is σ = 42231578. Its totient is φ = 42231576.

The previous prime is 42231571. The next prime is 42231589. The reversal of 42231577 is 77513224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23707161 + 18524416 = 4869^2 + 4304^2 .

It is a cyclic number.

It is not a de Polignac number, because 42231577 - 2²³ = 33842969 is a prime.

It is not a weakly prime, because it can be changed into another prime (42231571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21115788 + 21115789.

It is an arithmetic number, because the mean of its divisors is an integer number (21115789).

Almost surely, 2^42231577 is an apocalyptic number.

It is an amenable number.

42231577 is a deficient number, since it is larger than the sum of its proper divisors (1).

42231577 is an equidigital number, since it uses as much as digits as its factorization.

42231577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 31.

The square root of 42231577 is about 6498.5826916336. The cubic root of 42231577 is about 348.2403572482.

The spelling of 42231577 in words is "forty-two million, two hundred thirty-one thousand, five hundred seventy-seven".