31219423 has 8 divisors (see below), whose sum is σ = 31646160. Its totient is φ = 30795840.

The previous prime is 31219393. The next prime is 31219483. The reversal of 31219423 is 32491213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31219423 - 2⁹ = 31218911 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 (31219483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24168 + ... + 25426.

It is an arithmetic number, because the mean of its divisors is an integer number (3955770).

Almost surely, 2^31219423 is an apocalyptic number.

31219423 is a deficient number, since it is larger than the sum of its proper divisors (426737).

31219423 is a wasteful number, since it uses less digits than its factorization.

31219423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577.

The product of its digits is 1296, while the sum is 25.

The square root of 31219423 is about 5587.4343844022. The cubic root of 31219423 is about 314.8774966664.

It can be divided in two parts, 3121 and 9423, that added together give a square (12544 = 112²).

The spelling of 31219423 in words is "thirty-one million, two hundred nineteen thousand, four hundred twenty-three".