31112641 has 4 divisors (see below), whose sum is σ = 35557312. Its totient is φ = 26667972.

The previous prime is 31112617. The next prime is 31112651. The reversal of 31112641 is 14621113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31112641 - 2¹¹ = 31110593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31112611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2222325 + ... + 2222338.

It is an arithmetic number, because the mean of its divisors is an integer number (8889328).

Almost surely, 2^31112641 is an apocalyptic number.

It is an amenable number.

31112641 is a deficient number, since it is larger than the sum of its proper divisors (4444671).

31112641 is an equidigital number, since it uses as much as digits as its factorization.

31112641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444670.

The product of its digits is 144, while the sum is 19.

The square root of 31112641 is about 5577.8706510639. The cubic root of 31112641 is about 314.5180873277.

Adding to 31112641 its reverse (14621113), we get a palindrome (45733754).

It can be divided in two parts, 3111264 and 1, that added together give a triangular number (3111265 = T₂₄₉₄).

The spelling of 31112641 in words is "thirty-one million, one hundred twelve thousand, six hundred forty-one".