5121549225 has 81 divisors (see below), whose sum is σ = 9960318693. Its totient is φ = 2514507840.

The previous prime is 5121549197. The next prime is 5121549229. The reversal of 5121549225 is 5229451215.

The square root of 5121549225 is 71565.

It is a perfect power (a square), and thus also a powerful number.

5121549225 is a `hidden beast` number, since 512 + 1 + 54 + 92 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1320086889 + 3801462336 = 36333^2 + 61656^2 .

It is not a de Polignac number, because 5121549225 - 2¹⁵ = 5121516457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5121549225.

It is not an unprimeable number, because it can be changed into a prime (5121549229) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 13954992 + ... + 13955358.

Almost surely, 2^5121549225 is an apocalyptic number.

5121549225 is the 71565-th square number.

5121549225 is the 35783-rd centered octagonal number.

It is an amenable number.

5121549225 is a deficient number, since it is larger than the sum of its proper divisors (4838769468).

5121549225 is a wasteful number, since it uses less digits than its factorization.

5121549225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 388 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The cubic root of 5121549225 is about 1723.7215732492.

Multiplying 5121549225 by its sum of digits (36), we get a square (184375772100 = 429390²).

The spelling of 5121549225 in words is "five billion, one hundred twenty-one million, five hundred forty-nine thousand, two hundred twenty-five".