31311422 has 8 divisors (see below), whose sum is σ = 47737272. Its totient is φ = 15399000.

The previous prime is 31311421. The next prime is 31311431. The reversal of 31311422 is 22411313.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31311422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311421) 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, 128204 + ... + 128447.

It is an arithmetic number, because the mean of its divisors is an integer number (5967159).

Almost surely, 2^31311422 is an apocalyptic number.

31311422 is a deficient number, since it is larger than the sum of its proper divisors (16425850).

31311422 is a wasteful number, since it uses less digits than its factorization.

31311422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256714.

The product of its digits is 144, while the sum is 17.

The square root of 31311422 is about 5595.6609975945. The cubic root of 31311422 is about 315.1864924060.

Adding to 31311422 its reverse (22411313), we get a palindrome (53722735).

The spelling of 31311422 in words is "thirty-one million, three hundred eleven thousand, four hundred twenty-two".