1151821143 has 36 divisors (see below), whose sum is σ = 1854622224. Its totient is φ = 688195200.

The previous prime is 1151821109. The next prime is 1151821169. The reversal of 1151821143 is 3411281511.

1151821143 is a `hidden beast` number, since 1 + 1 + 518 + 2 + 1 + 143 = 666.

It is not a de Polignac number, because 1151821143 - 2¹⁰ = 1151820119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151821183) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69871 + ... + 84767.

It is an arithmetic number, because the mean of its divisors is an integer number (51517284).

Almost surely, 2^1151821143 is an apocalyptic number.

1151821143 is a deficient number, since it is larger than the sum of its proper divisors (702801081).

1151821143 is a wasteful number, since it uses less digits than its factorization.

1151821143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14996 (or 14982 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 1151821143 is about 33938.4905822283. The cubic root of 1151821143 is about 1048.2423027988.

The spelling of 1151821143 in words is "one billion, one hundred fifty-one million, eight hundred twenty-one thousand, one hundred forty-three".