16424247225 has 24 divisors (see below), whose sum is σ = 27173935360. Its totient is φ = 8753411520.

The previous prime is 16424247101. The next prime is 16424247227. The reversal of 16424247225 is 52274242461.

It is not a de Polignac number, because 16424247225 - 2⁷ = 16424247097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16424247227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30552 + ... + 183798.

Almost surely, 2^16424247225 is an apocalyptic number.

16424247225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16424247225 is a deficient number, since it is larger than the sum of its proper divisors (10749688135).

16424247225 is a wasteful number, since it uses less digits than its factorization.

16424247225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154689 (or 154684 counting only the distinct ones).

The product of its digits is 215040, while the sum is 39.

Adding to 16424247225 its reverse (52274242461), we get a palindrome (68698489686).

The spelling of 16424247225 in words is "sixteen billion, four hundred twenty-four million, two hundred forty-seven thousand, two hundred twenty-five".