31224448945 has 16 divisors (see below), whose sum is σ = 38041436160. Its totient is φ = 24600400000.

The previous prime is 31224448933. The next prime is 31224448949. The reversal of 31224448945 is 54984442213.

It is not a de Polignac number, because 31224448945 - 2¹⁵ = 31224416177 is a prime.

It is a super-2 number, since 2×31224448945² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31224448895 and 31224448904.

It is not an unprimeable number, because it can be changed into a prime (31224448949) 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 15 ways as a sum of consecutive naturals, for example, 28081 + ... + 251470.

It is an arithmetic number, because the mean of its divisors is an integer number (2377589760).

Almost surely, 2^31224448945 is an apocalyptic number.

It is an amenable number.

31224448945 is a deficient number, since it is larger than the sum of its proper divisors (6816987215).

31224448945 is a wasteful number, since it uses less digits than its factorization.

31224448945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279896.

The product of its digits is 1105920, while the sum is 46.

The spelling of 31224448945 in words is "thirty-one billion, two hundred twenty-four million, four hundred forty-eight thousand, nine hundred forty-five".