75522220 has 24 divisors (see below), whose sum is σ = 158760000. Its totient is φ = 30177792.

The previous prime is 75522157. The next prime is 75522221. The reversal of 75522220 is 2222557.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (75522221) 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, 36781 + ... + 38779.

It is an arithmetic number, because the mean of its divisors is an integer number (6615000).

Almost surely, 2^75522220 is an apocalyptic number.

It is an amenable number.

75522220 is an abundant number, since it is smaller than the sum of its proper divisors (83237780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75522220 is a wasteful number, since it uses less digits than its factorization.

75522220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897 (or 3895 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 75522220 is about 8690.3521217497. The cubic root of 75522220 is about 422.6928638751.

Adding to 75522220 its reverse (2222557), we get a palindrome (77744777).

The spelling of 75522220 in words is "seventy-five million, five hundred twenty-two thousand, two hundred twenty".