225394493523 has 16 divisors (see below), whose sum is σ = 318664538496. Its totient is φ = 141219308160.

The previous prime is 225394493521. The next prime is 225394493537. The reversal of 225394493523 is 325394493522.

It is not a de Polignac number, because 225394493523 - 2¹ = 225394493521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (225394493521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3162661 + ... + 3233142.

It is an arithmetic number, because the mean of its divisors is an integer number (19916533656).

Almost surely, 2^225394493523 is an apocalyptic number.

225394493523 is a deficient number, since it is larger than the sum of its proper divisors (93270044973).

225394493523 is a wasteful number, since it uses less digits than its factorization.

225394493523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396514.

The product of its digits is 6998400, while the sum is 51.

Subtracting 225394493523 from its reverse (325394493522), we obtain a palindrome (99999999999).

The spelling of 225394493523 in words is "two hundred twenty-five billion, three hundred ninety-four million, four hundred ninety-three thousand, five hundred twenty-three".