31248485 has 4 divisors (see below), whose sum is σ = 37498188. Its totient is φ = 24998784.

The previous prime is 31248479. The next prime is 31248493. The reversal of 31248485 is 58484213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58484213 = 29 ⋅2016697.

It can be written as a sum of positive squares in 2 ways, for example, as 5987809 + 25260676 = 2447^2 + 5026^2 .

It is a cyclic number.

It is not a de Polignac number, because 31248485 - 2¹⁸ = 30986341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3124844 + ... + 3124853.

It is an arithmetic number, because the mean of its divisors is an integer number (9374547).

Almost surely, 2^31248485 is an apocalyptic number.

It is an amenable number.

31248485 is a deficient number, since it is larger than the sum of its proper divisors (6249703).

31248485 is an equidigital number, since it uses as much as digits as its factorization.

31248485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6249702.

The product of its digits is 30720, while the sum is 35.

The square root of 31248485 is about 5590.0344363877. The cubic root of 31248485 is about 314.9751723104.

The spelling of 31248485 in words is "thirty-one million, two hundred forty-eight thousand, four hundred eighty-five".