31243434 has 8 divisors (see below), whose sum is σ = 62486880. Its totient is φ = 10414476.

The previous prime is 31243427. The next prime is 31243439. The reversal of 31243434 is 43434213.

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

31243434 is an admirable number.

It is a super-2 number, since 2×31243434² = 1952304336224712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31243439) 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, 2603614 + ... + 2603625.

It is an arithmetic number, because the mean of its divisors is an integer number (7810860).

Almost surely, 2^31243434 is an apocalyptic number.

31243434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31243434 is a wasteful number, since it uses less digits than its factorization.

31243434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207244.

The product of its digits is 3456, while the sum is 24.

The square root of 31243434 is about 5589.5826320039. The cubic root of 31243434 is about 314.9582005509.

Adding to 31243434 its reverse (43434213), we get a palindrome (74677647).

The spelling of 31243434 in words is "thirty-one million, two hundred forty-three thousand, four hundred thirty-four".