31142222224181 has 2 divisors, whose sum is σ = 31142222224182. Its totient is φ = 31142222224180.

The previous prime is 31142222224147. The next prime is 31142222224187. The reversal of 31142222224181 is 18142222224113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21137843003281 + 10004379220900 = 4597591^2 + 3162970^2 .

It is a cyclic number.

It is not a de Polignac number, because 31142222224181 - 2¹⁴ = 31142222207797 is a prime.

It is a super-2 number, since 2×31142222224181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31142222224187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571111112090 + 15571111112091.

It is an arithmetic number, because the mean of its divisors is an integer number (15571111112091).

Almost surely, 2^{31142222224181} is an apocalyptic number.

It is an amenable number.

31142222224181 is a deficient number, since it is larger than the sum of its proper divisors (1).

31142222224181 is an equidigital number, since it uses as much as digits as its factorization.

31142222224181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 35.

Adding to 31142222224181 its reverse (18142222224113), we get a palindrome (49284444448294).

The spelling of 31142222224181 in words is "thirty-one trillion, one hundred forty-two billion, two hundred twenty-two million, two hundred twenty-four thousand, one hundred eighty-one".