42430031257 has 2 divisors, whose sum is σ = 42430031258. Its totient is φ = 42430031256.

The previous prime is 42430031249. The next prime is 42430031309. The reversal of 42430031257 is 75213003424.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23822070336 + 18607960921 = 154344^2 + 136411^2 .

It is a cyclic number.

It is not a de Polignac number, because 42430031257 - 2³ = 42430031249 is a prime.

It is not a weakly prime, because it can be changed into another prime (42430031207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215015628 + 21215015629.

It is an arithmetic number, because the mean of its divisors is an integer number (21215015629).

Almost surely, 2^42430031257 is an apocalyptic number.

It is an amenable number.

42430031257 is a deficient number, since it is larger than the sum of its proper divisors (1).

42430031257 is an equidigital number, since it uses as much as digits as its factorization.

42430031257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

The spelling of 42430031257 in words is "forty-two billion, four hundred thirty million, thirty-one thousand, two hundred fifty-seven".