75852221 has 2 divisors, whose sum is σ = 75852222. Its totient is φ = 75852220.

The previous prime is 75852209. The next prime is 75852223. The reversal of 75852221 is 12225857.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74200996 + 1651225 = 8614^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 75852221 - 2¹⁰ = 75851197 is a prime.

Together with 75852223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75852223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37926110 + 37926111.

It is an arithmetic number, because the mean of its divisors is an integer number (37926111).

Almost surely, 2^75852221 is an apocalyptic number.

It is an amenable number.

75852221 is a deficient number, since it is larger than the sum of its proper divisors (1).

75852221 is an equidigital number, since it uses as much as digits as its factorization.

75852221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 32.

The square root of 75852221 is about 8709.3180559674. The cubic root of 75852221 is about 423.3076338929.

The spelling of 75852221 in words is "seventy-five million, eight hundred fifty-two thousand, two hundred twenty-one".