75147220 has 12 divisors (see below), whose sum is σ = 157809204. Its totient is φ = 30058880.

The previous prime is 75147217. The next prime is 75147227. The reversal of 75147220 is 2274157.

It can be written as a sum of positive squares in 2 ways, for example, as 28005264 + 47141956 = 5292^2 + 6866^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75147227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1878661 + ... + 1878700.

It is an arithmetic number, because the mean of its divisors is an integer number (13150767).

Almost surely, 2^75147220 is an apocalyptic number.

It is an amenable number.

75147220 is an abundant number, since it is smaller than the sum of its proper divisors (82661984).

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

75147220 is a wasteful number, since it uses less digits than its factorization.

75147220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757370 (or 3757368 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 75147220 is about 8668.7496214852. The cubic root of 75147220 is about 421.9920859832.

The spelling of 75147220 in words is "seventy-five million, one hundred forty-seven thousand, two hundred twenty".