105280815225 has 24 divisors (see below), whose sum is σ = 174073595680. Its totient is φ = 56146763520.

The previous prime is 105280815221. The next prime is 105280815239. The reversal of 105280815225 is 522518082501.

It is not a de Polignac number, because 105280815225 - 2² = 105280815221 is a prime.

It is a super-2 number, since 2×105280815225² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105280815221) 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, 2600337 + ... + 2640513.

Almost surely, 2^105280815225 is an apocalyptic number.

105280815225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

105280815225 is a deficient number, since it is larger than the sum of its proper divisors (68792780455).

105280815225 is a wasteful number, since it uses less digits than its factorization.

105280815225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75129 (or 75124 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 39.

Adding to 105280815225 its reverse (522518082501), we get a palindrome (627798897726).

The spelling of 105280815225 in words is "one hundred five billion, two hundred eighty million, eight hundred fifteen thousand, two hundred twenty-five".