75845221 has 8 divisors (see below), whose sum is σ = 76595904. Its totient is φ = 75098400.

The previous prime is 75845213. The next prime is 75845233. The reversal of 75845221 is 12254857.

It is a happy number.

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 75845221 - 2³ = 75845213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75845291) 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, 51546 + ... + 52996.

It is an arithmetic number, because the mean of its divisors is an integer number (9574488).

Almost surely, 2^75845221 is an apocalyptic number.

It is an amenable number.

75845221 is a deficient number, since it is larger than the sum of its proper divisors (750683).

75845221 is a wasteful number, since it uses less digits than its factorization.

75845221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931.

The product of its digits is 22400, while the sum is 34.

The square root of 75845221 is about 8708.9161782624. The cubic root of 75845221 is about 423.2946118853.

The spelling of 75845221 in words is "seventy-five million, eight hundred forty-five thousand, two hundred twenty-one".