31422137 has 16 divisors (see below), whose sum is σ = 34207632. Its totient is φ = 28753920.

The previous prime is 31422101. The next prime is 31422151. The reversal of 31422137 is 73122413.

It can be written as a sum of positive squares in 8 ways, for example, as 4682896 + 26739241 = 2164^2 + 5171^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422137 - 2⁸ = 31421881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31422037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162713 + ... + 162905.

It is an arithmetic number, because the mean of its divisors is an integer number (2137977).

Almost surely, 2^31422137 is an apocalyptic number.

It is an amenable number.

31422137 is a deficient number, since it is larger than the sum of its proper divisors (2785495).

31422137 is a wasteful number, since it uses less digits than its factorization.

31422137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 1008, while the sum is 23.

The square root of 31422137 is about 5605.5452009595. The cubic root of 31422137 is about 315.5575478771.

The spelling of 31422137 in words is "thirty-one million, four hundred twenty-two thousand, one hundred thirty-seven".