75221210 has 16 divisors (see below), whose sum is σ = 135611496. Its totient is φ = 30041088.

The previous prime is 75221207. The next prime is 75221213. The reversal of 75221210 is 1212257.

It is an interprime number because it is at equal distance from previous prime (75221207) and next prime (75221213).

It can be written as a sum of positive squares in 4 ways, for example, as 66863329 + 8357881 = 8177^2 + 2891^2 .

It is not an unprimeable number, because it can be changed into a prime (75221213) 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, 1142 + ... + 12318.

Almost surely, 2^75221210 is an apocalyptic number.

75221210 is a deficient number, since it is larger than the sum of its proper divisors (60390286).

75221210 is a wasteful number, since it uses less digits than its factorization.

75221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11857.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 75221210 is about 8673.0161996851. The cubic root of 75221210 is about 422.1305384440.

Adding to 75221210 its reverse (1212257), we get a palindrome (76433467).

The spelling of 75221210 in words is "seventy-five million, two hundred twenty-one thousand, two hundred ten".