31221225417 has 4 divisors (see below), whose sum is σ = 41628300560. Its totient is φ = 20814150276.

The previous prime is 31221225401. The next prime is 31221225439. The reversal of 31221225417 is 71452212213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31221225417 - 2⁴ = 31221225401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31221225457) 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 3 ways as a sum of consecutive naturals, for example, 5203537567 + ... + 5203537572.

It is an arithmetic number, because the mean of its divisors is an integer number (10407075140).

Almost surely, 2^31221225417 is an apocalyptic number.

It is an amenable number.

31221225417 is a deficient number, since it is larger than the sum of its proper divisors (10407075143).

31221225417 is a wasteful number, since it uses less digits than its factorization.

31221225417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10407075142.

The product of its digits is 6720, while the sum is 30.

The spelling of 31221225417 in words is "thirty-one billion, two hundred twenty-one million, two hundred twenty-five thousand, four hundred seventeen".