7520225557 has 4 divisors (see below), whose sum is σ = 8098704460. Its totient is φ = 6941746656.

The previous prime is 7520225549. The next prime is 7520225561. The reversal of 7520225557 is 7555220257.

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 2932330801 + 4587894756 = 54151^2 + 67734^2 .

It is not a de Polignac number, because 7520225557 - 2³ = 7520225549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7520220557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289239432 + ... + 289239457.

It is an arithmetic number, because the mean of its divisors is an integer number (2024676115).

Almost surely, 2^7520225557 is an apocalyptic number.

It is an amenable number.

7520225557 is a deficient number, since it is larger than the sum of its proper divisors (578478903).

7520225557 is a wasteful number, since it uses less digits than its factorization.

7520225557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578478902.

The product of its (nonzero) digits is 245000, while the sum is 40.

The square root of 7520225557 is about 86719.2340660364. The cubic root of 7520225557 is about 1959.1918052232.

The spelling of 7520225557 in words is "seven billion, five hundred twenty million, two hundred twenty-five thousand, five hundred fifty-seven".