31442111 has 2 divisors, whose sum is σ = 31442112. Its totient is φ = 31442110.

The previous prime is 31442101. The next prime is 31442113. The reversal of 31442111 is 11124413.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31442111 - 2¹⁴ = 31425727 is a prime.

Together with 31442113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31442111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31442113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721055 + 15721056.

It is an arithmetic number, because the mean of its divisors is an integer number (15721056).

Almost surely, 2^31442111 is an apocalyptic number.

31442111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442111 is an equidigital number, since it uses as much as digits as its factorization.

31442111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 31442111 is about 5607.3265465817. The cubic root of 31442111 is about 315.6243968358.

Adding to 31442111 its reverse (11124413), we get a palindrome (42566524).

It can be divided in two parts, 314421 and 11, that added together give a cube (314432 = 68³).

The spelling of 31442111 in words is "thirty-one million, four hundred forty-two thousand, one hundred eleven".