1155522061 has 2 divisors, whose sum is σ = 1155522062. Its totient is φ = 1155522060.

The previous prime is 1155522029. The next prime is 1155522077. The reversal of 1155522061 is 1602255511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 882446436 + 273075625 = 29706^2 + 16525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155522061 - 2⁵ = 1155522029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155532061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577761030 + 577761031.

It is an arithmetic number, because the mean of its divisors is an integer number (577761031).

Almost surely, 2^1155522061 is an apocalyptic number.

It is an amenable number.

1155522061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155522061 is an equidigital number, since it uses as much as digits as its factorization.

1155522061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 1155522061 is about 33992.9707586730. The cubic root of 1155522061 is about 1049.3638053863.

Adding to 1155522061 its reverse (1602255511), we get a palindrome (2757777572).

The spelling of 1155522061 in words is "one billion, one hundred fifty-five million, five hundred twenty-two thousand, sixty-one".