75351221 has 8 divisors (see below), whose sum is σ = 82264800. Its totient is φ = 68448240.

The previous prime is 75351209. The next prime is 75351223. The reversal of 75351221 is 12215357.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75351221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75351223) 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, 23450 + ... + 26468.

It is an arithmetic number, because the mean of its divisors is an integer number (10283100).

Almost surely, 2^75351221 is an apocalyptic number.

It is an amenable number.

75351221 is a deficient number, since it is larger than the sum of its proper divisors (6913579).

75351221 is a wasteful number, since it uses less digits than its factorization.

75351221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5299.

The product of its digits is 2100, while the sum is 26.

The square root of 75351221 is about 8680.5081072481. The cubic root of 75351221 is about 422.3735994324.

Adding to 75351221 its reverse (12215357), we get a palindrome (87566578).

The spelling of 75351221 in words is "seventy-five million, three hundred fifty-one thousand, two hundred twenty-one".