31203423 has 12 divisors (see below), whose sum is σ = 46120360. Its totient is φ = 20318256.

The previous prime is 31203409. The next prime is 31203427. The reversal of 31203423 is 32430213.

It is not a de Polignac number, because 31203423 - 2⁴ = 31203407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31203396 and 31203405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39928 + ... + 40701.

Almost surely, 2^31203423 is an apocalyptic number.

31203423 is a deficient number, since it is larger than the sum of its proper divisors (14916937).

31203423 is a wasteful number, since it uses less digits than its factorization.

31203423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80678 (or 80675 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31203423 is about 5586.0024167557. The cubic root of 31203423 is about 314.8236957483.

Adding to 31203423 its reverse (32430213), we get a palindrome (63633636).

It can be divided in two parts, 31203 and 423, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 31203423 in words is "thirty-one million, two hundred three thousand, four hundred twenty-three".