1143551157 has 64 divisors (see below), whose sum is σ = 1926758400. Its totient is φ = 588565440.

The previous prime is 1143551153. The next prime is 1143551173. The reversal of 1143551157 is 7511553411.

It is not a de Polignac number, because 1143551157 - 2² = 1143551153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143551153) 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 63 ways as a sum of consecutive naturals, for example, 728988 + ... + 730554.

It is an arithmetic number, because the mean of its divisors is an integer number (30105600).

Almost surely, 2^1143551157 is an apocalyptic number.

It is an amenable number.

1143551157 is a deficient number, since it is larger than the sum of its proper divisors (783207243).

1143551157 is a wasteful number, since it uses less digits than its factorization.

1143551157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686.

The product of its digits is 10500, while the sum is 33.

The square root of 1143551157 is about 33816.4332388855. The cubic root of 1143551157 is about 1045.7275084844.

The spelling of 1143551157 in words is "one billion, one hundred forty-three million, five hundred fifty-one thousand, one hundred fifty-seven".