180661225 has 12 divisors (see below), whose sum is σ = 226241100. Its totient is φ = 143096000.

The previous prime is 180661171. The next prime is 180661237. The reversal of 180661225 is 522166081.

It can be written as a sum of positive squares in 6 ways, for example, as 994009 + 179667216 = 997^2 + 13404^2 .

It is not a de Polignac number, because 180661225 - 2¹⁵ = 180628457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33250 + ... + 38299.

It is an arithmetic number, because the mean of its divisors is an integer number (18853425).

Almost surely, 2^180661225 is an apocalyptic number.

It is an amenable number.

180661225 is a deficient number, since it is larger than the sum of its proper divisors (45579875).

180661225 is a wasteful number, since it uses less digits than its factorization.

180661225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71660 (or 71655 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 180661225 is about 13441.0276764837. The cubic root of 180661225 is about 565.3121464136.

It can be divided in two parts, 18066 and 1225, that added together give a palindrome (19291).

The spelling of 180661225 in words is "one hundred eighty million, six hundred sixty-one thousand, two hundred twenty-five".