42213431257 has 2 divisors, whose sum is σ = 42213431258. Its totient is φ = 42213431256.

The previous prime is 42213431207. The next prime is 42213431287. The reversal of 42213431257 is 75213431224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41460697161 + 752734096 = 203619^2 + 27436^2 .

It is a cyclic number.

It is not a de Polignac number, because 42213431257 - 2⁷ = 42213431129 is a prime.

It is not a weakly prime, because it can be changed into another prime (42213431207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21106715628 + 21106715629.

It is an arithmetic number, because the mean of its divisors is an integer number (21106715629).

Almost surely, 2^42213431257 is an apocalyptic number.

It is an amenable number.

42213431257 is a deficient number, since it is larger than the sum of its proper divisors (1).

42213431257 is an equidigital number, since it uses as much as digits as its factorization.

42213431257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The spelling of 42213431257 in words is "forty-two billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred fifty-seven".