1151566541 has 2 divisors, whose sum is σ = 1151566542. Its totient is φ = 1151566540.

The previous prime is 1151566529. The next prime is 1151566567. The reversal of 1151566541 is 1456651511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001406025 + 150160516 = 31645^2 + 12254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151566541 is a prime.

It is a super-2 number, since 2×1151566541² = 2652210996701409362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151566511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575783270 + 575783271.

It is an arithmetic number, because the mean of its divisors is an integer number (575783271).

Almost surely, 2^1151566541 is an apocalyptic number.

It is an amenable number.

1151566541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151566541 is an equidigital number, since it uses as much as digits as its factorization.

1151566541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 35.

The square root of 1151566541 is about 33934.7394420526. The cubic root of 1151566541 is about 1048.1650615665.

The spelling of 1151566541 in words is "one billion, one hundred fifty-one million, five hundred sixty-six thousand, five hundred forty-one".