1050165581 has 2 divisors, whose sum is σ = 1050165582. Its totient is φ = 1050165580.

The previous prime is 1050165547. The next prime is 1050165607. The reversal of 1050165581 is 1855610501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 934280356 + 115885225 = 30566^2 + 10765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1050165581 is a prime.

It is a super-2 number, since 2×1050165581² = 2205695495034135122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1050165521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525082790 + 525082791.

It is an arithmetic number, because the mean of its divisors is an integer number (525082791).

Almost surely, 2^1050165581 is an apocalyptic number.

It is an amenable number.

1050165581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1050165581 is an equidigital number, since it uses as much as digits as its factorization.

1050165581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 32.

The square root of 1050165581 is about 32406.2583616190. The cubic root of 1050165581 is about 1016.4497812845.

The spelling of 1050165581 in words is "one billion, fifty million, one hundred sixty-five thousand, five hundred eighty-one".