31442231939 has 2 divisors, whose sum is σ = 31442231940. Its totient is φ = 31442231938.

The previous prime is 31442231923. The next prime is 31442231963. The reversal of 31442231939 is 93913224413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31442231939 - 2⁴ = 31442231923 is a prime.

It is a super-2 number, since 2×31442231939² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31442231896 and 31442231905.

It is not a weakly prime, because it can be changed into another prime (31442131939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721115969 + 15721115970.

It is an arithmetic number, because the mean of its divisors is an integer number (15721115970).

Almost surely, 2^31442231939 is an apocalyptic number.

31442231939 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442231939 is an equidigital number, since it uses as much as digits as its factorization.

31442231939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The spelling of 31442231939 in words is "thirty-one billion, four hundred forty-two million, two hundred thirty-one thousand, nine hundred thirty-nine".