202157843 has 8 divisors (see below), whose sum is σ = 206269536. Its totient is φ = 198072000.

The previous prime is 202157821. The next prime is 202157861. The reversal of 202157843 is 348751202.

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 202157843 - 2⁶ = 202157779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202157873) 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, 9743 + ... + 22343.

It is an arithmetic number, because the mean of its divisors is an integer number (25783692).

Almost surely, 2^202157843 is an apocalyptic number.

202157843 is a deficient number, since it is larger than the sum of its proper divisors (4111693).

202157843 is a wasteful number, since it uses less digits than its factorization.

202157843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 202157843 is about 14218.2222165783. Note that the first 4 decimals coincide. The cubic root of 202157843 is about 586.8992191355.

The spelling of 202157843 in words is "two hundred two million, one hundred fifty-seven thousand, eight hundred forty-three".