31280242 has 8 divisors (see below), whose sum is σ = 53623296. Its totient is φ = 13405812.

The previous prime is 31280231. The next prime is 31280267. The reversal of 31280242 is 24208213.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1117138 + ... + 1117165.

It is an arithmetic number, because the mean of its divisors is an integer number (6702912).

Almost surely, 2^31280242 is an apocalyptic number.

31280242 is a deficient number, since it is larger than the sum of its proper divisors (22343054).

31280242 is a wasteful number, since it uses less digits than its factorization.

31280242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234312.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 31280242 is about 5592.8742163578. The cubic root of 31280242 is about 315.0818364679.

Adding to 31280242 its reverse (24208213), we get a palindrome (55488455).

The spelling of 31280242 in words is "thirty-one million, two hundred eighty thousand, two hundred forty-two".