22219990815251 has 2 divisors, whose sum is σ = 22219990815252. Its totient is φ = 22219990815250.

The previous prime is 22219990815167. The next prime is 22219990815271. The reversal of 22219990815251 is 15251809991222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22219990815251 - 2¹⁰ = 22219990814227 is a prime.

It is a super-2 number, since 2×22219990815251² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22219990815271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11109995407625 + 11109995407626.

It is an arithmetic number, because the mean of its divisors is an integer number (11109995407626).

Almost surely, 2^{22219990815251} is an apocalyptic number.

22219990815251 is a deficient number, since it is larger than the sum of its proper divisors (1).

22219990815251 is an equidigital number, since it uses as much as digits as its factorization.

22219990815251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 56.

The spelling of 22219990815251 in words is "twenty-two trillion, two hundred nineteen billion, nine hundred ninety million, eight hundred fifteen thousand, two hundred fifty-one".