1152816181 has 16 divisors (see below), whose sum is σ = 1271982528. Its totient is φ = 1036086400.

The previous prime is 1152816167. The next prime is 1152816193. The reversal of 1152816181 is 1816182511.

It is a cyclic number.

It is not a de Polignac number, because 1152816181 - 2²⁷ = 1018598453 is a prime.

It is a super-2 number, since 2×1152816181² = 2657970294350849522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152816131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 965721 + ... + 966913.

It is an arithmetic number, because the mean of its divisors is an integer number (79498908).

Almost surely, 2^1152816181 is an apocalyptic number.

1152816181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1152816181 is a deficient number, since it is larger than the sum of its proper divisors (119166347).

1152816181 is a wasteful number, since it uses less digits than its factorization.

1152816181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132.

The product of its digits is 3840, while the sum is 34.

The square root of 1152816181 is about 33953.1468497399. The cubic root of 1152816181 is about 1048.5440686068.

Adding to 1152816181 its reverse (1816182511), we get a palindrome (2968998692).

The spelling of 1152816181 in words is "one billion, one hundred fifty-two million, eight hundred sixteen thousand, one hundred eighty-one".