5215511225 has 24 divisors (see below), whose sum is σ = 6579375768. Its totient is φ = 4100672000.

The previous prime is 5215511221. The next prime is 5215511233. The reversal of 5215511225 is 5221155125.

It can be written as a sum of positive squares in 12 ways, for example, as 1215707689 + 3999803536 = 34867^2 + 63244^2 .

It is not a de Polignac number, because 5215511225 - 2² = 5215511221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5215511221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 338387 + ... + 353463.

It is an arithmetic number, because the mean of its divisors is an integer number (274140657).

Almost surely, 2^5215511225 is an apocalyptic number.

It is an amenable number.

5215511225 is a deficient number, since it is larger than the sum of its proper divisors (1363864543).

5215511225 is a wasteful number, since it uses less digits than its factorization.

5215511225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15325 (or 15320 counting only the distinct ones).

The product of its digits is 5000, while the sum is 29.

The square root of 5215511225 is about 72218.4964188538. The cubic root of 5215511225 is about 1734.1991198864.

The spelling of 5215511225 in words is "five billion, two hundred fifteen million, five hundred eleven thousand, two hundred twenty-five".