31421124215 has 8 divisors (see below), whose sum is σ = 40605760608. Its totient is φ = 23203291680.

The previous prime is 31421124209. The next prime is 31421124223. The reversal of 31421124215 is 51242112413.

It is a happy number.

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

It is not a de Polignac number, because 31421124215 - 2¹⁰ = 31421123191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 241700891 + ... + 241701020.

It is an arithmetic number, because the mean of its divisors is an integer number (5075720076).

Almost surely, 2^31421124215 is an apocalyptic number.

31421124215 is a deficient number, since it is larger than the sum of its proper divisors (9184636393).

31421124215 is a wasteful number, since it uses less digits than its factorization.

31421124215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483401929.

The product of its digits is 1920, while the sum is 26.

Adding to 31421124215 its reverse (51242112413), we get a palindrome (82663236628).

The spelling of 31421124215 in words is "thirty-one billion, four hundred twenty-one million, one hundred twenty-four thousand, two hundred fifteen".