75113281 has 2 divisors, whose sum is σ = 75113282. Its totient is φ = 75113280.

The previous prime is 75113273. The next prime is 75113287. The reversal of 75113281 is 18231157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64256256 + 10857025 = 8016^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 75113281 - 2³ = 75113273 is a prime.

It is a super-2 number, since 2×75113281² = 11284009965169922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75113287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37556640 + 37556641.

It is an arithmetic number, because the mean of its divisors is an integer number (37556641).

Almost surely, 2^75113281 is an apocalyptic number.

It is an amenable number.

75113281 is a deficient number, since it is larger than the sum of its proper divisors (1).

75113281 is an equidigital number, since it uses as much as digits as its factorization.

75113281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 75113281 is about 8666.7918516600. The cubic root of 75113281 is about 421.9285478331.

The spelling of 75113281 in words is "seventy-five million, one hundred thirteen thousand, two hundred eighty-one".