75221481 has 16 divisors (see below), whose sum is σ = 109067904. Its totient is φ = 45921024.

The previous prime is 75221453. The next prime is 75221483. The reversal of 75221481 is 18412257.

It is not a de Polignac number, because 75221481 - 2⁵ = 75221449 is a prime.

It is a super-2 number, since 2×75221481² = 11316542407666722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75221483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18045 + ... + 21818.

It is an arithmetic number, because the mean of its divisors is an integer number (6816744).

Almost surely, 2^75221481 is an apocalyptic number.

It is an amenable number.

75221481 is a deficient number, since it is larger than the sum of its proper divisors (33846423).

75221481 is a wasteful number, since it uses less digits than its factorization.

75221481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39920.

The product of its digits is 4480, while the sum is 30.

The square root of 75221481 is about 8673.0318228403. The cubic root of 75221481 is about 422.1310453810.

The spelling of 75221481 in words is "seventy-five million, two hundred twenty-one thousand, four hundred eighty-one".