2225643153521 has 8 divisors (see below), whose sum is σ = 2256857323560. Its totient is φ = 2194448602752.

The previous prime is 2225643153511. The next prime is 2225643153529. The reversal of 2225643153521 is 1253513465222.

It can be written as a sum of positive squares in 4 ways, for example, as 506817271921 + 1718825881600 = 711911^2 + 1311040^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2225643153521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2225643153529) 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, 4676270 + ... + 5130183.

It is an arithmetic number, because the mean of its divisors is an integer number (282107165445).

Almost surely, 2^{2225643153521} is an apocalyptic number.

It is an amenable number.

2225643153521 is a deficient number, since it is larger than the sum of its proper divisors (31214170039).

2225643153521 is an equidigital number, since it uses as much as digits as its factorization.

2225643153521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9809635.

The product of its digits is 432000, while the sum is 41.

The spelling of 2225643153521 in words is "two trillion, two hundred twenty-five billion, six hundred forty-three million, one hundred fifty-three thousand, five hundred twenty-one".