10247511521 has 4 divisors (see below), whose sum is σ = 11035781652. Its totient is φ = 9459241392.

The previous prime is 10247511499. The next prime is 10247511523. The reversal of 10247511521 is 12511574201.

10247511521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3951882496 + 6295629025 = 62864^2 + 79345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10247511521 is a prime.

It is a super-2 number, since 2×10247511521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10247511523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394135046 + ... + 394135071.

It is an arithmetic number, because the mean of its divisors is an integer number (2758945413).

Almost surely, 2^10247511521 is an apocalyptic number.

It is an amenable number.

10247511521 is a deficient number, since it is larger than the sum of its proper divisors (788270131).

10247511521 is an equidigital number, since it uses as much as digits as its factorization.

10247511521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788270130.

The product of its (nonzero) digits is 2800, while the sum is 29.

The spelling of 10247511521 in words is "ten billion, two hundred forty-seven million, five hundred eleven thousand, five hundred twenty-one".