75040221 has 8 divisors (see below), whose sum is σ = 100178784. Its totient is φ = 49964240.

The previous prime is 75040211. The next prime is 75040223. The reversal of 75040221 is 12204057.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75040221 - 2⁷ = 75040093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75040223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12771 + ... + 17696.

It is an arithmetic number, because the mean of its divisors is an integer number (12522348).

Almost surely, 2^75040221 is an apocalyptic number.

It is an amenable number.

75040221 is a deficient number, since it is larger than the sum of its proper divisors (25138563).

75040221 is a wasteful number, since it uses less digits than its factorization.

75040221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31291.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 75040221 is about 8662.5758871135. The cubic root of 75040221 is about 421.7917051905.

Adding to 75040221 its reverse (12204057), we get a palindrome (87244278).

The spelling of 75040221 in words is "seventy-five million, forty thousand, two hundred twenty-one".