75221313 has 4 divisors (see below), whose sum is σ = 100295088. Its totient is φ = 50147540.

The previous prime is 75221299. The next prime is 75221329. The reversal of 75221313 is 31312257.

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.

It is a cyclic number.

It is not a de Polignac number, because 75221313 - 2⁶ = 75221249 is a prime.

It is a super-3 number, since 3×75221313³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (75221383) 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, 12536883 + ... + 12536888.

It is an arithmetic number, because the mean of its divisors is an integer number (25073772).

Almost surely, 2^75221313 is an apocalyptic number.

It is an amenable number.

75221313 is a deficient number, since it is larger than the sum of its proper divisors (25073775).

75221313 is a wasteful number, since it uses less digits than its factorization.

75221313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25073774.

The product of its digits is 1260, while the sum is 24.

The square root of 75221313 is about 8673.0221376404. The cubic root of 75221313 is about 422.1307311176.

The spelling of 75221313 in words is "seventy-five million, two hundred twenty-one thousand, three hundred thirteen".