31742243 has 8 divisors (see below), whose sum is σ = 34231008. Its totient is φ = 29260224.

The previous prime is 31742239. The next prime is 31742251. The reversal of 31742243 is 34224713.

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 31742243 - 2² = 31742239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31742203) 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, 12671 + ... + 14967.

It is an arithmetic number, because the mean of its divisors is an integer number (4278876).

Almost surely, 2^31742243 is an apocalyptic number.

31742243 is a deficient number, since it is larger than the sum of its proper divisors (2488765).

31742243 is a wasteful number, since it uses less digits than its factorization.

31742243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373.

The product of its digits is 4032, while the sum is 26.

The square root of 31742243 is about 5634.0254703010. The cubic root of 31742243 is about 316.6254869197.

Adding to 31742243 its reverse (34224713), we get a palindrome (65966956).

The spelling of 31742243 in words is "thirty-one million, seven hundred forty-two thousand, two hundred forty-three".