75037221 has 24 divisors (see below), whose sum is σ = 127222784. Its totient is φ = 41718240.

The previous prime is 75037219. The next prime is 75037231. The reversal of 75037221 is 12273057.

It is not a de Polignac number, because 75037221 - 2¹ = 75037219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75037231) 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, 13765 + ... + 18426.

Almost surely, 2^75037221 is an apocalyptic number.

It is an amenable number.

75037221 is a deficient number, since it is larger than the sum of its proper divisors (52185563).

75037221 is a wasteful number, since it uses less digits than its factorization.

75037221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32241 (or 32238 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 75037221 is about 8662.4027267266. The cubic root of 75037221 is about 421.7860842406.

The spelling of 75037221 in words is "seventy-five million, thirty-seven thousand, two hundred twenty-one".