243310020051 has 16 divisors (see below), whose sum is σ = 390271712000. Its totient is φ = 131716702368.

The previous prime is 243310020049. The next prime is 243310020067. The reversal of 243310020051 is 150020013342.

It is not a de Polignac number, because 243310020051 - 2¹ = 243310020049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243310020451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304899376 + ... + 304900173.

It is an arithmetic number, because the mean of its divisors is an integer number (24391982000).

Almost surely, 2^243310020051 is an apocalyptic number.

243310020051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

243310020051 is a deficient number, since it is larger than the sum of its proper divisors (146961691949).

243310020051 is a wasteful number, since it uses less digits than its factorization.

243310020051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609799578.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 243310020051 its reverse (150020013342), we get a palindrome (393330033393).

The spelling of 243310020051 in words is "two hundred forty-three billion, three hundred ten million, twenty thousand, fifty-one".