31311426 has 32 divisors (see below), whose sum is σ = 65581056. Its totient is φ = 9954000.

The previous prime is 31311421. The next prime is 31311431. The reversal of 31311426 is 62411313.

It is an interprime number because it is at equal distance from previous prime (31311421) and next prime (31311431).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31311421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12021 + ... + 14391.

It is an arithmetic number, because the mean of its divisors is an integer number (2049408).

Almost surely, 2^31311426 is an apocalyptic number.

31311426 is an abundant number, since it is smaller than the sum of its proper divisors (34269630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311426 is a wasteful number, since it uses less digits than its factorization.

31311426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478.

The product of its digits is 432, while the sum is 21.

The square root of 31311426 is about 5595.6613550143. The cubic root of 31311426 is about 315.1865058276.

Adding to 31311426 its reverse (62411313), we get a palindrome (93722739).

The spelling of 31311426 in words is "thirty-one million, three hundred eleven thousand, four hundred twenty-six".