202257643 has 6 divisors (see below), whose sum is σ = 235279356. Its totient is φ = 173363652.

The previous prime is 202257623. The next prime is 202257659. The reversal of 202257643 is 346752202.

202257643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-202257643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202257613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2063805 + ... + 2063902.

It is an arithmetic number, because the mean of its divisors is an integer number (39213226).

Almost surely, 2^202257643 is an apocalyptic number.

202257643 is a deficient number, since it is larger than the sum of its proper divisors (33021713).

202257643 is an equidigital number, since it uses as much as digits as its factorization.

202257643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4127721 (or 4127714 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 202257643 is about 14221.7313643593. The cubic root of 202257643 is about 586.9957821401.

The spelling of 202257643 in words is "two hundred two million, two hundred fifty-seven thousand, six hundred forty-three".