31211242 has 8 divisors (see below), whose sum is σ = 46867716. Its totient is φ = 15588672.

The previous prime is 31211231. The next prime is 31211287. The reversal of 31211242 is 24211213.

It can be written as a sum of positive squares in 2 ways, for example, as 26635921 + 4575321 = 5161^2 + 2139^2 .

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, 6033 + ... + 9940.

Almost surely, 2^31211242 is an apocalyptic number.

31211242 is a deficient number, since it is larger than the sum of its proper divisors (15656474).

31211242 is a wasteful number, since it uses less digits than its factorization.

31211242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16952.

The product of its digits is 96, while the sum is 16.

The square root of 31211242 is about 5586.7022473012. The cubic root of 31211242 is about 314.8499898816.

Adding to 31211242 its reverse (24211213), we get a palindrome (55422455).

The spelling of 31211242 in words is "thirty-one million, two hundred eleven thousand, two hundred forty-two".