31122097 has 4 divisors (see below), whose sum is σ = 31173156. Its totient is φ = 31071040.

The previous prime is 31122089. The next prime is 31122101. The reversal of 31122097 is 79022113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79022113 = 193 ⋅409441.

It can be written as a sum of positive squares in 2 ways, for example, as 12666481 + 18455616 = 3559^2 + 4296^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122097 - 2³ = 31122089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31122697) 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, 24604 + ... + 25837.

It is an arithmetic number, because the mean of its divisors is an integer number (7793289).

Almost surely, 2^31122097 is an apocalyptic number.

It is an amenable number.

31122097 is a deficient number, since it is larger than the sum of its proper divisors (51059).

31122097 is an equidigital number, since it uses as much as digits as its factorization.

31122097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51058.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 31122097 is about 5578.7182219574. The cubic root of 31122097 is about 314.5499477087.

The spelling of 31122097 in words is "thirty-one million, one hundred twenty-two thousand, ninety-seven".