31442141 has 2 divisors, whose sum is σ = 31442142. Its totient is φ = 31442140.

The previous prime is 31442113. The next prime is 31442161. The reversal of 31442141 is 14124413.

It is an a-pointer prime, because the next prime (31442161) can be obtained adding 31442141 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26728900 + 4713241 = 5170^2 + 2171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31442141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31442101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721070 + 15721071.

It is an arithmetic number, because the mean of its divisors is an integer number (15721071).

Almost surely, 2^31442141 is an apocalyptic number.

It is an amenable number.

31442141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442141 is an equidigital number, since it uses as much as digits as its factorization.

31442141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 31442141 is about 5607.3292216527. The cubic root of 31442141 is about 315.6244972184.

Adding to 31442141 its reverse (14124413), we get a palindrome (45566554).

The spelling of 31442141 in words is "thirty-one million, four hundred forty-two thousand, one hundred forty-one".