31486223 has 4 divisors (see below), whose sum is σ = 32337240. Its totient is φ = 30635208.

The previous prime is 31486201. The next prime is 31486229. The reversal of 31486223 is 32268413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31486223 - 2¹⁶ = 31420687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31486229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425453 + ... + 425526.

It is an arithmetic number, because the mean of its divisors is an integer number (8084310).

Almost surely, 2^31486223 is an apocalyptic number.

31486223 is a deficient number, since it is larger than the sum of its proper divisors (851017).

31486223 is an equidigital number, since it uses as much as digits as its factorization.

31486223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851016.

The product of its digits is 6912, while the sum is 29.

The square root of 31486223 is about 5611.2585932213. The cubic root of 31486223 is about 315.7719305834.

The spelling of 31486223 in words is "thirty-one million, four hundred eighty-six thousand, two hundred twenty-three".