73138225 has 12 divisors (see below), whose sum is σ = 90919900. Its totient is φ = 58363200.

The previous prime is 73138193. The next prime is 73138243. The reversal of 73138225 is 52283137.

It can be written as a sum of positive squares in 6 ways, for example, as 5914624 + 67223601 = 2432^2 + 8199^2 .

It is not a de Polignac number, because 73138225 - 2⁵ = 73138193 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, 7051 + ... + 13999.

Almost surely, 2^73138225 is an apocalyptic number.

It is an amenable number.

73138225 is a deficient number, since it is larger than the sum of its proper divisors (17781675).

73138225 is a wasteful number, since it uses less digits than its factorization.

73138225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7380 (or 7375 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 73138225 is about 8552.0889261045. The cubic root of 73138225 is about 418.1975383261.

The spelling of 73138225 in words is "seventy-three million, one hundred thirty-eight thousand, two hundred twenty-five".