1150553881 has 4 divisors (see below), whose sum is σ = 1177310992. Its totient is φ = 1123796772.

The previous prime is 1150553869. The next prime is 1150553891. The reversal of 1150553881 is 1883550511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1150553881 - 2⁷ = 1150553753 is a prime.

It is a super-2 number, since 2×1150553881² = 2647548466168324322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1150553881.

It is not an unprimeable number, because it can be changed into a prime (1150553851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13378491 + ... + 13378576.

It is an arithmetic number, because the mean of its divisors is an integer number (294327748).

Almost surely, 2^1150553881 is an apocalyptic number.

It is an amenable number.

1150553881 is a deficient number, since it is larger than the sum of its proper divisors (26757111).

1150553881 is an equidigital number, since it uses as much as digits as its factorization.

1150553881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26757110.

The product of its (nonzero) digits is 24000, while the sum is 37.

The square root of 1150553881 is about 33919.8154623518. The cubic root of 1150553881 is about 1047.8577277220.

The spelling of 1150553881 in words is "one billion, one hundred fifty million, five hundred fifty-three thousand, eight hundred eighty-one".