243013013131 has 4 divisors (see below), whose sum is σ = 277729157872. Its totient is φ = 208296868392.

The previous prime is 243013013129. The next prime is 243013013141. The reversal of 243013013131 is 131310310342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243013013131 - 2¹ = 243013013129 is a prime.

It is a super-2 number, since 2×243013013131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243013013141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17358072360 + ... + 17358072373.

It is an arithmetic number, because the mean of its divisors is an integer number (69432289468).

Almost surely, 2^243013013131 is an apocalyptic number.

243013013131 is a deficient number, since it is larger than the sum of its proper divisors (34716144741).

243013013131 is an equidigital number, since it uses as much as digits as its factorization.

243013013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34716144740.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 243013013131 its reverse (131310310342), we get a palindrome (374323323473).

The spelling of 243013013131 in words is "two hundred forty-three billion, thirteen million, thirteen thousand, one hundred thirty-one".