1143215853 has 8 divisors (see below), whose sum is σ = 1641540768. Its totient is φ = 703517424.

The previous prime is 1143215831. The next prime is 1143215891. The reversal of 1143215853 is 3585123411.

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

It is not a de Polignac number, because 1143215853 - 2¹⁸ = 1142953709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143215053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14656575 + ... + 14656652.

It is an arithmetic number, because the mean of its divisors is an integer number (205192596).

Almost surely, 2^1143215853 is an apocalyptic number.

1143215853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1143215853 is a deficient number, since it is larger than the sum of its proper divisors (498324915).

1143215853 is a wasteful number, since it uses less digits than its factorization.

1143215853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29313243.

The product of its digits is 14400, while the sum is 33.

The square root of 1143215853 is about 33811.4751674635. The cubic root of 1143215853 is about 1045.6252915466.

The spelling of 1143215853 in words is "one billion, one hundred forty-three million, two hundred fifteen thousand, eight hundred fifty-three".