75272225 has 24 divisors (see below), whose sum is σ = 107016960. Its totient is φ = 51448320.

The previous prime is 75272221. The next prime is 75272251. The reversal of 75272225 is 52227257.

It is not a de Polignac number, because 75272225 - 2² = 75272221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 75272191 and 75272200.

It is not an unprimeable number, because it can be changed into a prime (75272221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80561 + ... + 81489.

It is an arithmetic number, because the mean of its divisors is an integer number (4459040).

Almost surely, 2^75272225 is an apocalyptic number.

It is an amenable number.

75272225 is a deficient number, since it is larger than the sum of its proper divisors (31744735).

75272225 is a wasteful number, since it uses less digits than its factorization.

75272225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409 (or 1404 counting only the distinct ones).

The product of its digits is 19600, while the sum is 32.

The square root of 75272225 is about 8675.9567195785. The cubic root of 75272225 is about 422.2259464763.

The spelling of 75272225 in words is "seventy-five million, two hundred seventy-two thousand, two hundred twenty-five".