22015783857887 has 2 divisors, whose sum is σ = 22015783857888. Its totient is φ = 22015783857886.

The previous prime is 22015783857803. The next prime is 22015783857901. The reversal of 22015783857887 is 78875838751022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22015783857887 - 2¹⁴ = 22015783841503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22015783857887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22015783856887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11007891928943 + 11007891928944.

It is an arithmetic number, because the mean of its divisors is an integer number (11007891928944).

Almost surely, 2^{22015783857887} is an apocalyptic number.

22015783857887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22015783857887 is an equidigital number, since it uses as much as digits as its factorization.

22015783857887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 421478400, while the sum is 71.

The spelling of 22015783857887 in words is "twenty-two trillion, fifteen billion, seven hundred eighty-three million, eight hundred fifty-seven thousand, eight hundred eighty-seven".