22154522160557 has 2 divisors, whose sum is σ = 22154522160558. Its totient is φ = 22154522160556.

The previous prime is 22154522160481. The next prime is 22154522160593. The reversal of 22154522160557 is 75506122545122.

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., 21029662527721 + 1124859632836 = 4585811^2 + 1060594^2 .

It is a cyclic number.

It is not a de Polignac number, because 22154522160557 - 2²² = 22154517966253 is a prime.

It is a super-2 number, since 2×22154522160557² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22154522165557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077261080278 + 11077261080279.

It is an arithmetic number, because the mean of its divisors is an integer number (11077261080279).

Almost surely, 2^{22154522160557} is an apocalyptic number.

It is an amenable number.

22154522160557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22154522160557 is an equidigital number, since it uses as much as digits as its factorization.

22154522160557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680000, while the sum is 47.

The spelling of 22154522160557 in words is "twenty-two trillion, one hundred fifty-four billion, five hundred twenty-two million, one hundred sixty thousand, five hundred fifty-seven".