75228919 has 4 divisors (see below), whose sum is σ = 75310144. Its totient is φ = 75147696.

The previous prime is 75228869. The next prime is 75228949. The reversal of 75228919 is 91982257.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75228919 - 2²⁵ = 41674487 is a prime.

It is a super-2 number, since 2×75228919² = 11318780507817122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75228949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39207 + ... + 41080.

It is an arithmetic number, because the mean of its divisors is an integer number (18827536).

Almost surely, 2^75228919 is an apocalyptic number.

75228919 is a deficient number, since it is larger than the sum of its proper divisors (81225).

75228919 is an equidigital number, since it uses as much as digits as its factorization.

75228919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81224.

The product of its digits is 90720, while the sum is 43.

The square root of 75228919 is about 8673.4606126966. The cubic root of 75228919 is about 422.1449585486.

The spelling of 75228919 in words is "seventy-five million, two hundred twenty-eight thousand, nine hundred nineteen".