5525475721 has 2 divisors, whose sum is σ = 5525475722. Its totient is φ = 5525475720.

The previous prime is 5525475719. The next prime is 5525475793. The reversal of 5525475721 is 1275745255.

5525475721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5003581696 + 521894025 = 70736^2 + 22845^2 .

It is a cyclic number.

It is not a de Polignac number, because 5525475721 - 2¹ = 5525475719 is a prime.

Together with 5525475719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5525475121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2762737860 + 2762737861.

It is an arithmetic number, because the mean of its divisors is an integer number (2762737861).

Almost surely, 2^5525475721 is an apocalyptic number.

It is an amenable number.

5525475721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5525475721 is an equidigital number, since it uses as much as digits as its factorization.

5525475721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 490000, while the sum is 43.

The square root of 5525475721 is about 74333.5437134542. The cubic root of 5525475721 is about 1767.8953695554.

The spelling of 5525475721 in words is "five billion, five hundred twenty-five million, four hundred seventy-five thousand, seven hundred twenty-one".