1151322143 has 4 divisors (see below), whose sum is σ = 1153318080. Its totient is φ = 1149326208.

The previous prime is 1151322131. The next prime is 1151322149. The reversal of 1151322143 is 3412231511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1151322143 - 2⁶ = 1151322079 is a prime.

It is a super-2 number, since 2×1151322143² = 2651085353924224898, 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 (1151322149) 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, 997103 + ... + 998256.

It is an arithmetic number, because the mean of its divisors is an integer number (288329520).

Almost surely, 2^1151322143 is an apocalyptic number.

1151322143 is a deficient number, since it is larger than the sum of its proper divisors (1995937).

1151322143 is an equidigital number, since it uses as much as digits as its factorization.

1151322143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995936.

The product of its digits is 720, while the sum is 23.

The square root of 1151322143 is about 33931.1382508751. The cubic root of 1151322143 is about 1048.0909053164.

Adding to 1151322143 its reverse (3412231511), we get a palindrome (4563553654).

The spelling of 1151322143 in words is "one billion, one hundred fifty-one million, three hundred twenty-two thousand, one hundred forty-three".