75550081 has 2 divisors, whose sum is σ = 75550082. Its totient is φ = 75550080.

The previous prime is 75550037. The next prime is 75550093. The reversal of 75550081 is 18005557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75082225 + 467856 = 8665^2 + 684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75550081 is a prime.

It is a super-2 number, since 2×75550081² = 11415629478213122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75550001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37775040 + 37775041.

It is an arithmetic number, because the mean of its divisors is an integer number (37775041).

Almost surely, 2^75550081 is an apocalyptic number.

It is an amenable number.

75550081 is a deficient number, since it is larger than the sum of its proper divisors (1).

75550081 is an equidigital number, since it uses as much as digits as its factorization.

75550081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 75550081 is about 8691.9549584659. The cubic root of 75550081 is about 422.7448362085.

The spelling of 75550081 in words is "seventy-five million, five hundred fifty thousand, eighty-one".