75561133 has 2 divisors, whose sum is σ = 75561134. Its totient is φ = 75561132.

The previous prime is 75561131. The next prime is 75561139. The reversal of 75561133 is 33116557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65076489 + 10484644 = 8067^2 + 3238^2 .

It is a cyclic number.

It is not a de Polignac number, because 75561133 - 2¹ = 75561131 is a prime.

Together with 75561131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 75561095 and 75561104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75561131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37780566 + 37780567.

It is an arithmetic number, because the mean of its divisors is an integer number (37780567).

Almost surely, 2^75561133 is an apocalyptic number.

It is an amenable number.

75561133 is a deficient number, since it is larger than the sum of its proper divisors (1).

75561133 is an equidigital number, since it uses as much as digits as its factorization.

75561133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 31.

The square root of 75561133 is about 8692.5906955292. The cubic root of 75561133 is about 422.7654492379.

The spelling of 75561133 in words is "seventy-five million, five hundred sixty-one thousand, one hundred thirty-three".