31212023 has 4 divisors (see below), whose sum is σ = 31937928. Its totient is φ = 30486120.

The previous prime is 31212001. The next prime is 31212037. The reversal of 31212023 is 32021213.

It is a happy number.

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 31212023 - 2⁶ = 31211959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31211989 and 31212007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212043) 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, 362888 + ... + 362973.

It is an arithmetic number, because the mean of its divisors is an integer number (7984482).

Almost surely, 2^31212023 is an apocalyptic number.

31212023 is a deficient number, since it is larger than the sum of its proper divisors (725905).

31212023 is an equidigital number, since it uses as much as digits as its factorization.

31212023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725904.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31212023 is about 5586.7721449868. The cubic root of 31212023 is about 314.8526160271.

Adding to 31212023 its reverse (32021213), we get a palindrome (63233236).

The spelling of 31212023 in words is "thirty-one million, two hundred twelve thousand, twenty-three".