31423311 has 6 divisors (see below), whose sum is σ = 45389240. Its totient is φ = 20948868.

The previous prime is 31423297. The next prime is 31423331. The reversal of 31423311 is 11332413.

It is not a de Polignac number, because 31423311 - 2¹³ = 31415119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1745731 + ... + 1745748.

Almost surely, 2^31423311 is an apocalyptic number.

31423311 is a deficient number, since it is larger than the sum of its proper divisors (13965929).

31423311 is a wasteful number, since it uses less digits than its factorization.

31423311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491485 (or 3491482 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 31423311 is about 5605.6499177169. The cubic root of 31423311 is about 315.5614778024.

Adding to 31423311 its reverse (11332413), we get a palindrome (42755724).

The spelling of 31423311 in words is "thirty-one million, four hundred twenty-three thousand, three hundred eleven".