2265344251021 has 4 divisors (see below), whose sum is σ = 2265395112000. Its totient is φ = 2265293390044.

The previous prime is 2265344251019. The next prime is 2265344251039. The reversal of 2265344251021 is 1201524435622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2265344251021 - 2¹ = 2265344251019 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 (2265344251921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25363621 + ... + 25452778.

It is an arithmetic number, because the mean of its divisors is an integer number (566348778000).

Almost surely, 2^{2265344251021} is an apocalyptic number.

It is an amenable number.

2265344251021 is a deficient number, since it is larger than the sum of its proper divisors (50860979).

2265344251021 is an equidigital number, since it uses as much as digits as its factorization.

2265344251021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50860978.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 2265344251021 its reverse (1201524435622), we get a palindrome (3466868686643).

The spelling of 2265344251021 in words is "two trillion, two hundred sixty-five billion, three hundred forty-four million, two hundred fifty-one thousand, twenty-one".