61516225 has 6 divisors (see below), whose sum is σ = 76280150. Its totient is φ = 49212960.

The previous prime is 61516223. The next prime is 61516249. The reversal of 61516225 is 52261516.

61516225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 20466576 + 41049649 = 4524^2 + 6407^2 .

It is not a de Polignac number, because 61516225 - 2¹ = 61516223 is a prime.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 61516193 and 61516202.

It is not an unprimeable number, because it can be changed into a prime (61516223) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1230300 + ... + 1230349.

Almost surely, 2^61516225 is an apocalyptic number.

It is an amenable number.

61516225 is a deficient number, since it is larger than the sum of its proper divisors (14763925).

61516225 is a wasteful number, since it uses less digits than its factorization.

61516225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460659 (or 2460654 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 61516225 is about 7843.2279706764. The cubic root of 61516225 is about 394.7570476285.

The spelling of 61516225 in words is "sixty-one million, five hundred sixteen thousand, two hundred twenty-five".