31421113 has 8 divisors (see below), whose sum is σ = 31907232. Its totient is φ = 30938496.

The previous prime is 31421111. The next prime is 31421141. The reversal of 31421113 is 31112413.

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

It is a cyclic number.

It is not a de Polignac number, because 31421113 - 2¹ = 31421111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31421111) 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 7 ways as a sum of consecutive naturals, for example, 21306 + ... + 22732.

It is an arithmetic number, because the mean of its divisors is an integer number (3988404).

Almost surely, 2^31421113 is an apocalyptic number.

It is an amenable number.

31421113 is a deficient number, since it is larger than the sum of its proper divisors (486119).

31421113 is a wasteful number, since it uses less digits than its factorization.

31421113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its digits is 72, while the sum is 16.

The square root of 31421113 is about 5605.4538620882. The cubic root of 31421113 is about 315.5541199919.

Adding to 31421113 its reverse (31112413), we get a palindrome (62533526).

The spelling of 31421113 in words is "thirty-one million, four hundred twenty-one thousand, one hundred thirteen".