31421667 has 8 divisors (see below), whose sum is σ = 41956096. Its totient is φ = 20917512.

The previous prime is 31421659. The next prime is 31421683. The reversal of 31421667 is 76612413.

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

It is not a de Polignac number, because 31421667 - 2³ = 31421659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31421617) 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, 5023 + ... + 9384.

It is an arithmetic number, because the mean of its divisors is an integer number (5244512).

Almost surely, 2^31421667 is an apocalyptic number.

31421667 is a deficient number, since it is larger than the sum of its proper divisors (10534429).

31421667 is a wasteful number, since it uses less digits than its factorization.

31421667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15137.

The product of its digits is 6048, while the sum is 30.

The square root of 31421667 is about 5605.5032780295. The cubic root of 31421667 is about 315.5559745406. Note that the first 3 decimals are identical.

The spelling of 31421667 in words is "thirty-one million, four hundred twenty-one thousand, six hundred sixty-seven".