75551149 has 2 divisors, whose sum is σ = 75551150. Its totient is φ = 75551148.

The previous prime is 75551141. The next prime is 75551153. The reversal of 75551149 is 94115557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43797924 + 31753225 = 6618^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 75551149 - 2³ = 75551141 is a prime.

It is a super-2 number, since 2×75551149² = 11415952230440402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75551141) 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, 37775574 + 37775575.

It is an arithmetic number, because the mean of its divisors is an integer number (37775575).

Almost surely, 2^75551149 is an apocalyptic number.

It is an amenable number.

75551149 is a deficient number, since it is larger than the sum of its proper divisors (1).

75551149 is an equidigital number, since it uses as much as digits as its factorization.

75551149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 37.

The square root of 75551149 is about 8692.0163943702. The cubic root of 75551149 is about 422.7468282176.

The spelling of 75551149 in words is "seventy-five million, five hundred fifty-one thousand, one hundred forty-nine".