75246221 has 4 divisors (see below), whose sum is σ = 75583872. Its totient is φ = 74908572.

The previous prime is 75246203. The next prime is 75246239. The reversal of 75246221 is 12264257.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12264257 = 1103 ⋅11119.

It is an interprime number because it is at equal distance from previous prime (75246203) and next prime (75246239).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75246221 is a prime.

It is a super-3 number, since 3×75246221³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75248221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168491 + ... + 168936.

It is an arithmetic number, because the mean of its divisors is an integer number (18895968).

Almost surely, 2^75246221 is an apocalyptic number.

It is an amenable number.

75246221 is a deficient number, since it is larger than the sum of its proper divisors (337651).

75246221 is a wasteful number, since it uses less digits than its factorization.

75246221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337650.

The product of its digits is 6720, while the sum is 29.

The square root of 75246221 is about 8674.4579657752. The cubic root of 75246221 is about 422.1773192963.

The spelling of 75246221 in words is "seventy-five million, two hundred forty-six thousand, two hundred twenty-one".