31444109 has 4 divisors (see below), whose sum is σ = 31977120. Its totient is φ = 30911100.

The previous prime is 31444087. The next prime is 31444121. The reversal of 31444109 is 90144413.

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 a de Polignac number, because none of the positive numbers 2^k-31444109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31444159) 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, 266417 + ... + 266534.

It is an arithmetic number, because the mean of its divisors is an integer number (7994280).

Almost surely, 2^31444109 is an apocalyptic number.

It is an amenable number.

31444109 is a deficient number, since it is larger than the sum of its proper divisors (533011).

31444109 is an equidigital number, since it uses as much as digits as its factorization.

31444109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533010.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 31444109 is about 5607.5047035201. The cubic root of 31444109 is about 315.6310821819.

The spelling of 31444109 in words is "thirty-one million, four hundred forty-four thousand, one hundred nine".