2143290857 has 8 divisors (see below), whose sum is σ = 2236997184. Its totient is φ = 2049627888.

The previous prime is 2143290841. The next prime is 2143290913. The reversal of 2143290857 is 7580923412.

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

It is not a de Polignac number, because 2143290857 - 2⁴ = 2143290841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143295857) 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, 128363 + ... + 144095.

It is an arithmetic number, because the mean of its divisors is an integer number (279624648).

Almost surely, 2^2143290857 is an apocalyptic number.

It is an amenable number.

2143290857 is a deficient number, since it is larger than the sum of its proper divisors (93706327).

2143290857 is a wasteful number, since it uses less digits than its factorization.

2143290857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21679.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 2143290857 is about 46295.6893997703. The cubic root of 2143290857 is about 1289.3189636779.

The spelling of 2143290857 in words is "two billion, one hundred forty-three million, two hundred ninety thousand, eight hundred fifty-seven".