2265406505221 has 8 divisors (see below), whose sum is σ = 2303233289984. Its totient is φ = 2227601945520.

The previous prime is 2265406505147. The next prime is 2265406505233. The reversal of 2265406505221 is 1225056045622.

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 2265406505221 - 2¹⁵ = 2265406472453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265406505291) 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, 5350641 + ... + 5758486.

It is an arithmetic number, because the mean of its divisors is an integer number (287904161248).

Almost surely, 2^{2265406505221} is an apocalyptic number.

It is an amenable number.

2265406505221 is a deficient number, since it is larger than the sum of its proper divisors (37826784763).

2265406505221 is a wasteful number, since it uses less digits than its factorization.

2265406505221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11112531.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 2265406505221 in words is "two trillion, two hundred sixty-five billion, four hundred six million, five hundred five thousand, two hundred twenty-one".