2251540204212 has 48 divisors (see below), whose sum is σ = 5683087424000. Its totient is φ = 689674946688.

The previous prime is 2251540204189. The next prime is 2251540204231. The reversal of 2251540204212 is 2124020451522.

It is a self number, because there is not a number n which added to its sum of digits gives 2251540204212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32326087 + ... + 32395662.

Almost surely, 2^{2251540204212} is an apocalyptic number.

It is an amenable number.

2251540204212 is an abundant number, since it is smaller than the sum of its proper divisors (3431547219788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2251540204212 is a wasteful number, since it uses less digits than its factorization.

2251540204212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64721992 (or 64721990 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 2251540204212 its reverse (2124020451522), we get a palindrome (4375560655734).

The spelling of 2251540204212 in words is "two trillion, two hundred fifty-one billion, five hundred forty million, two hundred four thousand, two hundred twelve".