31447023 has 4 divisors (see below), whose sum is σ = 41929368. Its totient is φ = 20964680.

The previous prime is 31447021. The next prime is 31447027. The reversal of 31447023 is 32074413.

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 31447023 - 2¹ = 31447021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31446984 and 31447002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31447021) 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, 5241168 + ... + 5241173.

It is an arithmetic number, because the mean of its divisors is an integer number (10482342).

Almost surely, 2^31447023 is an apocalyptic number.

31447023 is a deficient number, since it is larger than the sum of its proper divisors (10482345).

31447023 is a wasteful number, since it uses less digits than its factorization.

31447023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10482344.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 31447023 is about 5607.7645278667. The cubic root of 31447023 is about 315.6408319739.

The spelling of 31447023 in words is "thirty-one million, four hundred forty-seven thousand, twenty-three".