31442240111 has 4 divisors (see below), whose sum is σ = 31480538424. Its totient is φ = 31403941800.

The previous prime is 31442240059. The next prime is 31442240113. The reversal of 31442240111 is 11104224413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31442240111 is a prime.

It is a super-2 number, since 2×31442240111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442240113) 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 in 3 ways as a sum of consecutive naturals, for example, 19147925 + ... + 19149566.

It is an arithmetic number, because the mean of its divisors is an integer number (7870134606).

Almost surely, 2^31442240111 is an apocalyptic number.

31442240111 is a deficient number, since it is larger than the sum of its proper divisors (38298313).

31442240111 is an equidigital number, since it uses as much as digits as its factorization.

31442240111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38298312.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 31442240111 its reverse (11104224413), we get a palindrome (42546464524).

The spelling of 31442240111 in words is "thirty-one billion, four hundred forty-two million, two hundred forty thousand, one hundred eleven".