31423234 has 4 divisors (see below), whose sum is σ = 47134854. Its totient is φ = 15711616.

The previous prime is 31423187. The next prime is 31423237. The reversal of 31423234 is 43232413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43232413 = 7 ⋅6176059.

It can be written as a sum of positive squares in only one way, i.e., 19829209 + 11594025 = 4453^2 + 3405^2 .

It is not an unprimeable number, because it can be changed into a prime (31423237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855807 + ... + 7855810.

Almost surely, 2^31423234 is an apocalyptic number.

31423234 is a deficient number, since it is larger than the sum of its proper divisors (15711620).

31423234 is a wasteful number, since it uses less digits than its factorization.

31423234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15711619.

The product of its digits is 1728, while the sum is 22.

The square root of 31423234 is about 5605.6430496420. The cubic root of 31423234 is about 315.5612200505.

Adding to 31423234 its reverse (43232413), we get a palindrome (74655647).

The spelling of 31423234 in words is "thirty-one million, four hundred twenty-three thousand, two hundred thirty-four".