2155641224412 has 48 divisors (see below), whose sum is σ = 5433104388992. Its totient is φ = 661270357440.

The previous prime is 2155641224353. The next prime is 2155641224417. The reversal of 2155641224412 is 2144221465512.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155641224417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20821798 + ... + 20925069.

Almost surely, 2^{2155641224412} is an apocalyptic number.

It is an amenable number.

2155641224412 is an abundant number, since it is smaller than the sum of its proper divisors (3277463164580).

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

2155641224412 is a wasteful number, since it uses less digits than its factorization.

2155641224412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41747218 (or 41747216 counting only the distinct ones).

The product of its digits is 153600, while the sum is 39.

Adding to 2155641224412 its reverse (2144221465512), we get a palindrome (4299862689924).

The spelling of 2155641224412 in words is "two trillion, one hundred fifty-five billion, six hundred forty-one million, two hundred twenty-four thousand, four hundred twelve".