42145365331 has 2 divisors, whose sum is σ = 42145365332. Its totient is φ = 42145365330.

The previous prime is 42145365307. The next prime is 42145365343. The reversal of 42145365331 is 13356354124.

42145365331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42145365331 - 2¹¹ = 42145363283 is a prime.

It is a super-2 number, since 2×42145365331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42145365131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21072682665 + 21072682666.

It is an arithmetic number, because the mean of its divisors is an integer number (21072682666).

Almost surely, 2^42145365331 is an apocalyptic number.

42145365331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42145365331 is an equidigital number, since it uses as much as digits as its factorization.

42145365331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 37.

The spelling of 42145365331 in words is "forty-two billion, one hundred forty-five million, three hundred sixty-five thousand, three hundred thirty-one".