31474823 has 4 divisors (see below), whose sum is σ = 31650840. Its totient is φ = 31298808.

The previous prime is 31474801. The next prime is 31474829. The reversal of 31474823 is 32847413.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31474823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31474823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31474829) 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, 87740 + ... + 88097.

It is an arithmetic number, because the mean of its divisors is an integer number (7912710).

Almost surely, 2^31474823 is an apocalyptic number.

31474823 is a deficient number, since it is larger than the sum of its proper divisors (176017).

31474823 is a wasteful number, since it uses less digits than its factorization.

31474823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176016.

The product of its digits is 16128, while the sum is 32.

The square root of 31474823 is about 5610.2426863728. The cubic root of 31474823 is about 315.7338161935.

The spelling of 31474823 in words is "thirty-one million, four hundred seventy-four thousand, eight hundred twenty-three".