2166551430241 has 9 divisors (see below), whose sum is σ = 2381433831889. Its totient is φ = 1969577490100.

The previous prime is 2166551430167. The next prime is 2166551430317. The reversal of 2166551430241 is 1420341556612.

The square root of 2166551430241 is 1471921.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2166551430241 - 2⁹ = 2166551429729 is a prime.

It is a super-3 number, since 3×2166551430241³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2166551430194 and 2166551430203.

It is not an unprimeable number, because it can be changed into a prime (2166551130241) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16124226 + ... + 16258036.

Almost surely, 2^{2166551430241} is an apocalyptic number.

2166551430241 is the 1471921-st square number.

2166551430241 is the 735961-st centered octagonal number.

It is an amenable number.

2166551430241 is a deficient number, since it is larger than the sum of its proper divisors (214882401648).

2166551430241 is an frugal number, since it uses more digits than its factorization.

2166551430241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267644 (or 133822 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 2166551430241 its reverse (1420341556612), we get a palindrome (3586892986853).

The spelling of 2166551430241 in words is "two trillion, one hundred sixty-six billion, five hundred fifty-one million, four hundred thirty thousand, two hundred forty-one".