75303220 has 12 divisors (see below), whose sum is σ = 158136804. Its totient is φ = 30121280.

The previous prime is 75303211. The next prime is 75303257. The reversal of 75303220 is 2230357.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52012944 + 23290276 = 7212^2 + 4826^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75303191 and 75303200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1882561 + ... + 1882600.

It is an arithmetic number, because the mean of its divisors is an integer number (13178067).

Almost surely, 2^75303220 is an apocalyptic number.

It is an amenable number.

75303220 is an abundant number, since it is smaller than the sum of its proper divisors (82833584).

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

75303220 is a wasteful number, since it uses less digits than its factorization.

75303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765170 (or 3765168 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 75303220 is about 8677.7427940681. The cubic root of 75303220 is about 422.2838921411.

Adding to 75303220 its reverse (2230357), we get a palindrome (77533577).

The spelling of 75303220 in words is "seventy-five million, three hundred three thousand, two hundred twenty".