31214242 has 4 divisors (see below), whose sum is σ = 46821366. Its totient is φ = 15607120.

The previous prime is 31214233. The next prime is 31214263. The reversal of 31214242 is 24241213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17884441 + 13329801 = 4229^2 + 3651^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7803559 + ... + 7803562.

Almost surely, 2^31214242 is an apocalyptic number.

31214242 is a deficient number, since it is larger than the sum of its proper divisors (15607124).

31214242 is a wasteful number, since it uses less digits than its factorization.

31214242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15607123.

The product of its digits is 384, while the sum is 19.

The square root of 31214242 is about 5586.9707355597. The cubic root of 31214242 is about 314.8600772694.

Adding to 31214242 its reverse (24241213), we get a palindrome (55455455).

The spelling of 31214242 in words is "thirty-one million, two hundred fourteen thousand, two hundred forty-two".