10518520225 has 6 divisors (see below), whose sum is σ = 13042965110. Its totient is φ = 8414816160.

The previous prime is 10518520223. The next prime is 10518520253. The reversal of 10518520225 is 52202581501.

It can be written as a sum of positive squares in 3 ways, for example, as 1547399569 + 8971120656 = 39337^2 + 94716^2 .

It is not a de Polignac number, because 10518520225 - 2¹ = 10518520223 is a prime.

It is a super-2 number, since 2×10518520225² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10518520223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210370380 + ... + 210370429.

Almost surely, 2^10518520225 is an apocalyptic number.

It is an amenable number.

10518520225 is a deficient number, since it is larger than the sum of its proper divisors (2524444885).

10518520225 is an equidigital number, since it uses as much as digits as its factorization.

10518520225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420740819 (or 420740814 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 31.

The spelling of 10518520225 in words is "ten billion, five hundred eighteen million, five hundred twenty thousand, two hundred twenty-five".