31422113 has 4 divisors (see below), whose sum is σ = 32188548. Its totient is φ = 30655680.

The previous prime is 31422101. The next prime is 31422151. The reversal of 31422113 is 31122413.

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 6091024 + 25331089 = 2468^2 + 5033^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422113 - 2⁸ = 31421857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31422091 and 31422100.

It is not an unprimeable number, because it can be changed into a prime (31442113) 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, 383156 + ... + 383237.

It is an arithmetic number, because the mean of its divisors is an integer number (8047137).

Almost surely, 2^31422113 is an apocalyptic number.

It is an amenable number.

31422113 is a deficient number, since it is larger than the sum of its proper divisors (766435).

31422113 is an equidigital number, since it uses as much as digits as its factorization.

31422113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766434.

The product of its digits is 144, while the sum is 17.

The square root of 31422113 is about 5605.5430602217. The cubic root of 31422113 is about 315.5574675369.

Adding to 31422113 its reverse (31122413), we get a palindrome (62544526).

The spelling of 31422113 in words is "thirty-one million, four hundred twenty-two thousand, one hundred thirteen".