402100243 has 12 divisors (see below), whose sum is σ = 414222984. Its totient is φ = 390320000.

The previous prime is 402100229. The next prime is 402100289. The reversal of 402100243 is 342001204.

It is not a de Polignac number, because 402100243 - 2²¹ = 400003091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402100213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421455 + ... + 422407.

It is an arithmetic number, because the mean of its divisors is an integer number (34518582).

Almost surely, 2^402100243 is an apocalyptic number.

402100243 is a deficient number, since it is larger than the sum of its proper divisors (12122741).

402100243 is an equidigital number, since it uses as much as digits as its factorization.

402100243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 402100243 is about 20052.4373331523. The cubic root of 402100243 is about 738.0936095250.

Adding to 402100243 its reverse (342001204), we get a palindrome (744101447).

The spelling of 402100243 in words is "four hundred two million, one hundred thousand, two hundred forty-three".