75221577 has 12 divisors (see below), whose sum is σ = 111180784. Its totient is φ = 48981240.

The previous prime is 75221543. The next prime is 75221579. The reversal of 75221577 is 77512257.

It is not a de Polignac number, because 75221577 - 2⁷ = 75221449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75221579) 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, 96799 + ... + 97572.

Almost surely, 2^75221577 is an apocalyptic number.

It is an amenable number.

75221577 is a deficient number, since it is larger than the sum of its proper divisors (35959207).

75221577 is a wasteful number, since it uses less digits than its factorization.

75221577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194420 (or 194417 counting only the distinct ones).

The product of its digits is 34300, while the sum is 36.

The square root of 75221577 is about 8673.0373572354. The cubic root of 75221577 is about 422.1312249598.

The spelling of 75221577 in words is "seventy-five million, two hundred twenty-one thousand, five hundred seventy-seven".