31440011 has 4 divisors (see below), whose sum is σ = 32806992. Its totient is φ = 30073032.

The previous prime is 31440001. The next prime is 31440049. The reversal of 31440011 is 11004413.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31440011 - 2¹⁴ = 31423627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31440001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683456 + ... + 683501.

It is an arithmetic number, because the mean of its divisors is an integer number (8201748).

Almost surely, 2^31440011 is an apocalyptic number.

31440011 is a deficient number, since it is larger than the sum of its proper divisors (1366981).

31440011 is a wasteful number, since it uses less digits than its factorization.

31440011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366980.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 31440011 is about 5607.1392884429. The cubic root of 31440011 is about 315.6173698904.

Adding to 31440011 its reverse (11004413), we get a palindrome (42444424).

The spelling of 31440011 in words is "thirty-one million, four hundred forty thousand, eleven".