31314505 has 4 divisors (see below), whose sum is σ = 37577412. Its totient is φ = 25051600.

The previous prime is 31314473. The next prime is 31314539. The reversal of 31314505 is 50541313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50541313 = 4813 ⋅10501.

It can be written as a sum of positive squares in 2 ways, for example, as 14561856 + 16752649 = 3816^2 + 4093^2 .

It is not a de Polignac number, because 31314505 - 2⁵ = 31314473 is a prime.

It is a Duffinian 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, 3131446 + ... + 3131455.

It is an arithmetic number, because the mean of its divisors is an integer number (9394353).

Almost surely, 2^31314505 is an apocalyptic number.

It is an amenable number.

31314505 is a deficient number, since it is larger than the sum of its proper divisors (6262907).

31314505 is an equidigital number, since it uses as much as digits as its factorization.

31314505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6262906.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 31314505 is about 5595.9364721197. The cubic root of 31314505 is about 315.1968367469.

Adding to 31314505 its reverse (50541313), we get a palindrome (81855818).

The spelling of 31314505 in words is "thirty-one million, three hundred fourteen thousand, five hundred five".