2256505346221 has 8 divisors (see below), whose sum is σ = 2580911605440. Its totient is φ = 1932611175168.

The previous prime is 2256505346219. The next prime is 2256505346239. The reversal of 2256505346221 is 1226435056522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2256505346221 - 2¹ = 2256505346219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256505346321) 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, 128012596 + ... + 128030221.

It is an arithmetic number, because the mean of its divisors is an integer number (322613950680).

Almost surely, 2^{2256505346221} is an apocalyptic number.

It is an amenable number.

2256505346221 is a deficient number, since it is larger than the sum of its proper divisors (324406259219).

2256505346221 is a wasteful number, since it uses less digits than its factorization.

2256505346221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256044083.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 2256505346221 in words is "two trillion, two hundred fifty-six billion, five hundred five million, three hundred forty-six thousand, two hundred twenty-one".