42907561331 has 2 divisors, whose sum is σ = 42907561332. Its totient is φ = 42907561330.

The previous prime is 42907561313. The next prime is 42907561343. The reversal of 42907561331 is 13316570924.

Together with previous prime (42907561313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42907561331 - 2¹⁸ = 42907299187 is a prime.

It is a super-2 number, since 2×42907561331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42907561351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21453780665 + 21453780666.

It is an arithmetic number, because the mean of its divisors is an integer number (21453780666).

Almost surely, 2^42907561331 is an apocalyptic number.

42907561331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42907561331 is an equidigital number, since it uses as much as digits as its factorization.

42907561331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 42907561331 in words is "forty-two billion, nine hundred seven million, five hundred sixty-one thousand, three hundred thirty-one".