31426117 has 4 divisors (see below), whose sum is σ = 31714540. Its totient is φ = 31137696.

The previous prime is 31426103. The next prime is 31426177. The reversal of 31426117 is 71162413.

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 11792356 + 19633761 = 3434^2 + 4431^2 .

It is a cyclic number.

It is not a de Polignac number, because 31426117 - 2¹¹ = 31424069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31426091 and 31426100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31426177) 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, 144048 + ... + 144265.

It is an arithmetic number, because the mean of its divisors is an integer number (7928635).

Almost surely, 2^31426117 is an apocalyptic number.

It is an amenable number.

31426117 is a deficient number, since it is larger than the sum of its proper divisors (288423).

31426117 is a wasteful number, since it uses less digits than its factorization.

31426117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288422.

The product of its digits is 1008, while the sum is 25.

The square root of 31426117 is about 5605.9001953299. The cubic root of 31426117 is about 315.5708703958.

The spelling of 31426117 in words is "thirty-one million, four hundred twenty-six thousand, one hundred seventeen".