2255420221340 has 72 divisors (see below), whose sum is σ = 5606576142720. Its totient is φ = 757064119680.

The previous prime is 2255420221331. The next prime is 2255420221357. The reversal of 2255420221340 is 431220245522.

It is a junction number, because it is equal to n+sod(n) for n = 2255420221297 and 2255420221306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35814380 + ... + 35877299.

Almost surely, 2^{2255420221340} is an apocalyptic number.

2255420221340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2255420221340 is an abundant number, since it is smaller than the sum of its proper divisors (3351155921380).

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

2255420221340 is a wasteful number, since it uses less digits than its factorization.

2255420221340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71691723 (or 71691710 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 2255420221340 its reverse (431220245522), we get a palindrome (2686640466862).

The spelling of 2255420221340 in words is "two trillion, two hundred fifty-five billion, four hundred twenty million, two hundred twenty-one thousand, three hundred forty".