31344191 has 2 divisors, whose sum is σ = 31344192. Its totient is φ = 31344190.

The previous prime is 31344169. The next prime is 31344197. The reversal of 31344191 is 19144313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31344191 - 2¹⁸ = 31082047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31344191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31344197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672095 + 15672096.

It is an arithmetic number, because the mean of its divisors is an integer number (15672096).

Almost surely, 2^31344191 is an apocalyptic number.

31344191 is a deficient number, since it is larger than the sum of its proper divisors (1).

31344191 is an equidigital number, since it uses as much as digits as its factorization.

31344191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 31344191 is about 5598.5883042067. The cubic root of 31344191 is about 315.2964069841.

The spelling of 31344191 in words is "thirty-one million, three hundred forty-four thousand, one hundred ninety-one".