10521541225 has 12 divisors (see below), whose sum is σ = 14050304716. Its totient is φ = 7769753280.

The previous prime is 10521541189. The next prime is 10521541229. The reversal of 10521541225 is 52214512501.

It can be written as a sum of positive squares in 6 ways, for example, as 4469323609 + 6052217616 = 66853^2 + 77796^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10521541225 is a prime.

It is a super-2 number, since 2×10521541225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10521541193 and 10521541202.

It is not an unprimeable number, because it can be changed into a prime (10521541229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16186662 + ... + 16187311.

Almost surely, 2^10521541225 is an apocalyptic number.

It is an amenable number.

10521541225 is a deficient number, since it is larger than the sum of its proper divisors (3528763491).

10521541225 is a wasteful number, since it uses less digits than its factorization.

10521541225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32373996 (or 32373991 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 10521541225 in words is "ten billion, five hundred twenty-one million, five hundred forty-one thousand, two hundred twenty-five".