7519491225 has 135 divisors (see below), whose sum is σ = 14586930061. Its totient is φ = 3829334400.

The previous prime is 7519491211. The next prime is 7519491283. The reversal of 7519491225 is 5221949157.

The square root of 7519491225 is 86715.

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

7519491225 is a `hidden beast` number, since 7 + 519 + 4 + 9 + 122 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3165075081 + 4354416144 = 56259^2 + 65988^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 7519491225 - 2⁵ = 7519491193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 159989152 + ... + 159989198.

Almost surely, 2^7519491225 is an apocalyptic number.

7519491225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7519491225 is the 86715-th square number.

7519491225 is the 43358-th centered octagonal number.

It is an amenable number.

7519491225 is a deficient number, since it is larger than the sum of its proper divisors (7067438836).

7519491225 is an equidigital number, since it uses as much as digits as its factorization.

7519491225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 96 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The cubic root of 7519491225 is about 1959.1280330195.

The spelling of 7519491225 in words is "seven billion, five hundred nineteen million, four hundred ninety-one thousand, two hundred twenty-five".