2251540204166 has 16 divisors (see below), whose sum is σ = 3684463467408. Its totient is φ = 1023392656800.

The previous prime is 2251540204163. The next prime is 2251540204189. The reversal of 2251540204166 is 6614020451522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251540204163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1066265 + ... + 2374868.

It is an arithmetic number, because the mean of its divisors is an integer number (230278966713).

Almost surely, 2^{2251540204166} is an apocalyptic number.

2251540204166 is a deficient number, since it is larger than the sum of its proper divisors (1432923263242).

2251540204166 is a wasteful number, since it uses less digits than its factorization.

2251540204166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470887.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 2251540204166 its reverse (6614020451522), we get a palindrome (8865560655688).

The spelling of 2251540204166 in words is "two trillion, two hundred fifty-one billion, five hundred forty million, two hundred four thousand, one hundred sixty-six".