75225561 has 16 divisors (see below), whose sum is σ = 109628928. Its totient is φ = 45676800.

The previous prime is 75225517. The next prime is 75225589. The reversal of 75225561 is 16552257.

It is not a de Polignac number, because 75225561 - 2⁹ = 75225049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75225511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22210 + ... + 25371.

It is an arithmetic number, because the mean of its divisors is an integer number (6851808).

Almost surely, 2^75225561 is an apocalyptic number.

It is an amenable number.

75225561 is a deficient number, since it is larger than the sum of its proper divisors (34403367).

75225561 is a wasteful number, since it uses less digits than its factorization.

75225561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47632.

The product of its digits is 21000, while the sum is 33.

The square root of 75225561 is about 8673.2670315170. The cubic root of 75225561 is about 422.1386773477.

The spelling of 75225561 in words is "seventy-five million, two hundred twenty-five thousand, five hundred sixty-one".