31371485 has 4 divisors (see below), whose sum is σ = 37645788. Its totient is φ = 25097184.

The previous prime is 31371407. The next prime is 31371497. The reversal of 31371485 is 58417313.

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 15792676 + 15578809 = 3974^2 + 3947^2 .

It is a cyclic number.

It is not a de Polignac number, because 31371485 - 2¹⁰ = 31370461 is a prime.

It is a super-2 number, since 2×31371485² = 1968340142210450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3137144 + ... + 3137153.

It is an arithmetic number, because the mean of its divisors is an integer number (9411447).

Almost surely, 2^31371485 is an apocalyptic number.

It is an amenable number.

31371485 is a deficient number, since it is larger than the sum of its proper divisors (6274303).

31371485 is an equidigital number, since it uses as much as digits as its factorization.

31371485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6274302.

The product of its digits is 10080, while the sum is 32.

The square root of 31371485 is about 5601.0253525582. The cubic root of 31371485 is about 315.3878987211.

Adding to 31371485 its reverse (58417313), we get a palindrome (89788798).

The spelling of 31371485 in words is "thirty-one million, three hundred seventy-one thousand, four hundred eighty-five".