225243447521 has 8 divisors (see below), whose sum is σ = 225378067200. Its totient is φ = 225108874080.

The previous prime is 225243447479. The next prime is 225243447551. The reversal of 225243447521 is 125744342522.

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-225243447521 is a prime.

It is a super-2 number, since 2×225243447521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225243447551) 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, 14742116 + ... + 14757386.

It is an arithmetic number, because the mean of its divisors is an integer number (28172258400).

Almost surely, 2^225243447521 is an apocalyptic number.

It is an amenable number.

225243447521 is a deficient number, since it is larger than the sum of its proper divisors (134619679).

225243447521 is a wasteful number, since it uses less digits than its factorization.

225243447521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23119.

The product of its digits is 537600, while the sum is 41.

The spelling of 225243447521 in words is "two hundred twenty-five billion, two hundred forty-three million, four hundred forty-seven thousand, five hundred twenty-one".