31411440221 has 16 divisors (see below), whose sum is σ = 36843061248. Its totient is φ = 26225026800.

The previous prime is 31411440197. The next prime is 31411440227. The reversal of 31411440221 is 12204411413.

It is not a de Polignac number, because 31411440221 - 2¹⁰ = 31411439197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31411440227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339485 + ... + 421986.

It is an arithmetic number, because the mean of its divisors is an integer number (2302691328).

Almost surely, 2^31411440221 is an apocalyptic number.

It is an amenable number.

31411440221 is a deficient number, since it is larger than the sum of its proper divisors (5431621027).

31411440221 is an equidigital number, since it uses as much as digits as its factorization.

31411440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761632.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 31411440221 its reverse (12204411413), we get a palindrome (43615851634).

The spelling of 31411440221 in words is "thirty-one billion, four hundred eleven million, four hundred forty thousand, two hundred twenty-one".