243089894831 has 12 divisors (see below), whose sum is σ = 282605623632. Its totient is φ = 204831174144.

The previous prime is 243089894819. The next prime is 243089894857. The reversal of 243089894831 is 138498980342.

It is a happy number.

It is not a de Polignac number, because 243089894831 - 2⁶ = 243089894767 is a prime.

It is a super-2 number, since 2×243089894831² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243089894731) 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, 4963730 + ... + 5012463.

It is an arithmetic number, because the mean of its divisors is an integer number (23550468636).

Almost surely, 2^243089894831 is an apocalyptic number.

243089894831 is a deficient number, since it is larger than the sum of its proper divisors (39515728801).

243089894831 is an frugal number, since it uses more digits than its factorization.

243089894831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9976318 (or 9976259 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 243089894831 in words is "two hundred forty-three billion, eighty-nine million, eight hundred ninety-four thousand, eight hundred thirty-one".