42310831 has 2 divisors, whose sum is σ = 42310832. Its totient is φ = 42310830.

The previous prime is 42310813. The next prime is 42310871. The reversal of 42310831 is 13801324.

Together with previous prime (42310813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42310831 - 2²³ = 33922223 is a prime.

It is a super-2 number, since 2×42310831² = 3580412839821122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42310871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21155415 + 21155416.

It is an arithmetic number, because the mean of its divisors is an integer number (21155416).

Almost surely, 2^42310831 is an apocalyptic number.

42310831 is a deficient number, since it is larger than the sum of its proper divisors (1).

42310831 is an equidigital number, since it uses as much as digits as its factorization.

42310831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 42310831 is about 6504.6776246022. The cubic root of 42310831 is about 348.4580631794.

The spelling of 42310831 in words is "forty-two million, three hundred ten thousand, eight hundred thirty-one".