7099521521 has 4 divisors (see below), whose sum is σ = 7517140452. Its totient is φ = 6681902592.

The previous prime is 7099521511. The next prime is 7099521547. The reversal of 7099521521 is 1251259907.

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 5652784225 + 1446737296 = 75185^2 + 38036^2 .

It is a cyclic number.

It is not a de Polignac number, because 7099521521 - 2¹⁴ = 7099505137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7099521511) 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, 208809440 + ... + 208809473.

It is an arithmetic number, because the mean of its divisors is an integer number (1879285113).

Almost surely, 2^7099521521 is an apocalyptic number.

It is an amenable number.

7099521521 is a deficient number, since it is larger than the sum of its proper divisors (417618931).

7099521521 is a wasteful number, since it uses less digits than its factorization.

7099521521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417618930.

The product of its (nonzero) digits is 56700, while the sum is 41.

The square root of 7099521521 is about 84258.6584334215. The cubic root of 7099521521 is about 1921.9541664354.

The spelling of 7099521521 in words is "seven billion, ninety-nine million, five hundred twenty-one thousand, five hundred twenty-one".