31396417 has 16 divisors (see below), whose sum is σ = 36064000. Its totient is φ = 27091584.

The previous prime is 31396381. The next prime is 31396439. The reversal of 31396417 is 71469313.

It is not a de Polignac number, because 31396417 - 2⁷ = 31396289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31396457) 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, 18709 + ... + 20317.

It is an arithmetic number, because the mean of its divisors is an integer number (2254000).

Almost surely, 2^31396417 is an apocalyptic number.

It is an amenable number.

31396417 is a deficient number, since it is larger than the sum of its proper divisors (4667583).

31396417 is a wasteful number, since it uses less digits than its factorization.

31396417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720.

The product of its digits is 13608, while the sum is 34.

The square root of 31396417 is about 5603.2505744434. The cubic root of 31396417 is about 315.4714264741.

It can be divided in two parts, 31396 and 417, that added together give a palindrome (31813).

The spelling of 31396417 in words is "thirty-one million, three hundred ninety-six thousand, four hundred seventeen".