22131340249 has 2 divisors, whose sum is σ = 22131340250. Its totient is φ = 22131340248.

The previous prime is 22131340241. The next prime is 22131340291. The reversal of 22131340249 is 94204313122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18047235600 + 4084104649 = 134340^2 + 63907^2 .

It is a cyclic number.

It is not a de Polignac number, because 22131340249 - 2³ = 22131340241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22131340249.

It is not a weakly prime, because it can be changed into another prime (22131340241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065670124 + 11065670125.

It is an arithmetic number, because the mean of its divisors is an integer number (11065670125).

Almost surely, 2^22131340249 is an apocalyptic number.

It is an amenable number.

22131340249 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131340249 is an equidigital number, since it uses as much as digits as its factorization.

22131340249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 22131340249 in words is "twenty-two billion, one hundred thirty-one million, three hundred forty thousand, two hundred forty-nine".