1143214381 has 8 divisors (see below), whose sum is σ = 1160008128. Its totient is φ = 1126440000.

The previous prime is 1143214343. The next prime is 1143214403. The reversal of 1143214381 is 1834123411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143214381 - 2¹¹ = 1143212333 is a prime.

It is a super-2 number, since 2×1143214381² = 2613878241850426322, 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 (1143284381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149706 + ... + 157156.

It is an arithmetic number, because the mean of its divisors is an integer number (145001016).

Almost surely, 2^1143214381 is an apocalyptic number.

It is an amenable number.

1143214381 is a deficient number, since it is larger than the sum of its proper divisors (16793747).

1143214381 is an equidigital number, since it uses as much as digits as its factorization.

1143214381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9683.

The product of its digits is 2304, while the sum is 28.

The square root of 1143214381 is about 33811.4533996987. The cubic root of 1143214381 is about 1045.6248427654.

Adding to 1143214381 its reverse (1834123411), we get a palindrome (2977337792).

The spelling of 1143214381 in words is "one billion, one hundred forty-three million, two hundred fourteen thousand, three hundred eighty-one".