31417945 has 12 divisors (see below), whose sum is σ = 40825836. Its totient is φ = 23200320.

The previous prime is 31417943. The next prime is 31417951. The reversal of 31417945 is 54971413.

It can be written as a sum of positive squares in 6 ways, for example, as 8874441 + 22543504 = 2979^2 + 4748^2 .

It is not a de Polignac number, because 31417945 - 2¹ = 31417943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31417945.

It is not an unprimeable number, because it can be changed into a prime (31417943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17746 + ... + 19435.

It is an arithmetic number, because the mean of its divisors is an integer number (3402153).

Almost surely, 2^31417945 is an apocalyptic number.

It is an amenable number.

31417945 is a deficient number, since it is larger than the sum of its proper divisors (9407891).

31417945 is a wasteful number, since it uses less digits than its factorization.

31417945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37212 (or 37199 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 31417945 is about 5605.1712730299. The cubic root of 31417945 is about 315.5435145003.

The spelling of 31417945 in words is "thirty-one million, four hundred seventeen thousand, nine hundred forty-five".