31423534 has 8 divisors (see below), whose sum is σ = 47310048. Its totient is φ = 15653520.

The previous prime is 31423529. The next prime is 31423573. The reversal of 31423534 is 43532413.

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

It is a junction number, because it is equal to n+sod(n) for n = 31423499 and 31423508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28447 + ... + 29530.

It is an arithmetic number, because the mean of its divisors is an integer number (5913756).

Almost surely, 2^31423534 is an apocalyptic number.

31423534 is a deficient number, since it is larger than the sum of its proper divisors (15886514).

31423534 is a wasteful number, since it uses less digits than its factorization.

31423534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58250.

The product of its digits is 4320, while the sum is 25.

The square root of 31423534 is about 5605.6698083280. The cubic root of 31423534 is about 315.5622242763.

Adding to 31423534 its reverse (43532413), we get a palindrome (74955947).

It can be divided in two parts, 3142 and 3534, that multiplied together give a triangular number (11103828 = T₄₇₁₂).

The spelling of 31423534 in words is "thirty-one million, four hundred twenty-three thousand, five hundred thirty-four".