22155551045501 has 2 divisors, whose sum is σ = 22155551045502. Its totient is φ = 22155551045500.

The previous prime is 22155551045491. The next prime is 22155551045521. The reversal of 22155551045501 is 10554015555122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14878963870276 + 7276587175225 = 3857326^2 + 2697515^2 .

It is a cyclic number.

It is not a de Polignac number, because 22155551045501 - 2⁶ = 22155551045437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22155551045521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077775522750 + 11077775522751.

It is an arithmetic number, because the mean of its divisors is an integer number (11077775522751).

Almost surely, 2^{22155551045501} is an apocalyptic number.

It is an amenable number.

22155551045501 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155551045501 is an equidigital number, since it uses as much as digits as its factorization.

22155551045501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250000, while the sum is 41.

The spelling of 22155551045501 in words is "twenty-two trillion, one hundred fifty-five billion, five hundred fifty-one million, forty-five thousand, five hundred one".