31440030025221 has 12 divisors (see below), whose sum is σ = 45413506107840. Its totient is φ = 20959960291560.

The previous prime is 31440030025207. The next prime is 31440030025241. The reversal of 31440030025221 is 12252003004413.

31440030025221 is a `hidden beast` number, since 3 + 1 + 4 + 400 + 3 + 0 + 0 + 252 + 2 + 1 = 666.

It is not a de Polignac number, because 31440030025221 - 2¹⁹ = 31440029500933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440030025241) 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 11 ways as a sum of consecutive naturals, for example, 1516531 + ... + 8073408.

It is an arithmetic number, because the mean of its divisors is an integer number (3784458842320).

Almost surely, 2^{31440030025221} is an apocalyptic number.

It is an amenable number.

31440030025221 is a deficient number, since it is larger than the sum of its proper divisors (13973476082619).

31440030025221 is a wasteful number, since it uses less digits than its factorization.

31440030025221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9954216 (or 9954213 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 31440030025221 its reverse (12252003004413), we get a palindrome (43692033029634).

The spelling of 31440030025221 in words is "thirty-one trillion, four hundred forty billion, thirty million, twenty-five thousand, two hundred twenty-one".