31442441 has 2 divisors, whose sum is σ = 31442442. Its totient is φ = 31442440.

The previous prime is 31442431. The next prime is 31442479. The reversal of 31442441 is 14424413.

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., 29116816 + 2325625 = 5396^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 31442441 - 2⁶ = 31442377 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31442431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721220 + 15721221.

It is an arithmetic number, because the mean of its divisors is an integer number (15721221).

Almost surely, 2^31442441 is an apocalyptic number.

It is an amenable number.

31442441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442441 is an equidigital number, since it uses as much as digits as its factorization.

31442441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 23.

The square root of 31442441 is about 5607.3559722921. The cubic root of 31442441 is about 315.6255010416.

Adding to 31442441 its reverse (14424413), we get a palindrome (45866854).

The spelling of 31442441 in words is "thirty-one million, four hundred forty-two thousand, four hundred forty-one".