42243413957 has 2 divisors, whose sum is σ = 42243413958. Its totient is φ = 42243413956.

The previous prime is 42243413941. The next prime is 42243414023. The reversal of 42243413957 is 75931434224.

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., 42238059361 + 5354596 = 205519^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 42243413957 - 2⁴ = 42243413941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42243413057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121706978 + 21121706979.

It is an arithmetic number, because the mean of its divisors is an integer number (21121706979).

Almost surely, 2^42243413957 is an apocalyptic number.

It is an amenable number.

42243413957 is a deficient number, since it is larger than the sum of its proper divisors (1).

42243413957 is an equidigital number, since it uses as much as digits as its factorization.

42243413957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 44.

The spelling of 42243413957 in words is "forty-two billion, two hundred forty-three million, four hundred thirteen thousand, nine hundred fifty-seven".