75748221 has 12 divisors (see below), whose sum is σ = 112944000. Its totient is φ = 48869640.

The previous prime is 75748201. The next prime is 75748291. The reversal of 75748221 is 12284757.

75748221 is a `hidden beast` number, since 7 + 574 + 82 + 2 + 1 = 666.

It is not a de Polignac number, because 75748221 - 2¹⁰ = 75747197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75748201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135471 + ... + 136028.

It is an arithmetic number, because the mean of its divisors is an integer number (9412000).

Almost surely, 2^75748221 is an apocalyptic number.

It is an amenable number.

75748221 is a deficient number, since it is larger than the sum of its proper divisors (37195779).

75748221 is a wasteful number, since it uses less digits than its factorization.

75748221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271536 (or 271533 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 75748221 is about 8703.3453912849. The cubic root of 75748221 is about 423.1140815314.

The spelling of 75748221 in words is "seventy-five million, seven hundred forty-eight thousand, two hundred twenty-one".