75222257 has 4 divisors (see below), whose sum is σ = 82060656. Its totient is φ = 68383860.

The previous prime is 75222253. The next prime is 75222269.

75222257 is nontrivially palindromic in base 10.

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 75222257 - 2² = 75222253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75222253) 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, 3419183 + ... + 3419204.

It is an arithmetic number, because the mean of its divisors is an integer number (20515164).

Almost surely, 2^75222257 is an apocalyptic number.

It is an amenable number.

75222257 is a deficient number, since it is larger than the sum of its proper divisors (6838399).

75222257 is a wasteful number, since it uses less digits than its factorization.

75222257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6838398.

The product of its digits is 19600, while the sum is 32.

The square root of 75222257 is about 8673.0765590994. The cubic root of 75222257 is about 422.1324969724.

It can be divided in two parts, 7522 and 2257, that added together give a palindrome (9779).

The spelling of 75222257 in words is "seventy-five million, two hundred twenty-two thousand, two hundred fifty-seven".