31422449 has 4 divisors (see below), whose sum is σ = 31454964. Its totient is φ = 31389936.

The previous prime is 31422403. The next prime is 31422463. The reversal of 31422449 is 94422413.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15366400 + 16056049 = 3920^2 + 4007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31422449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31472449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14762 + ... + 16755.

It is an arithmetic number, because the mean of its divisors is an integer number (7863741).

Almost surely, 2^31422449 is an apocalyptic number.

It is an amenable number.

31422449 is a deficient number, since it is larger than the sum of its proper divisors (32515).

31422449 is an equidigital number, since it uses as much as digits as its factorization.

31422449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32514.

The product of its digits is 6912, while the sum is 29.

The square root of 31422449 is about 5605.5730304760. The cubic root of 31422449 is about 315.5585922961.

The spelling of 31422449 in words is "thirty-one million, four hundred twenty-two thousand, four hundred forty-nine".