1511112320243 has 4 divisors (see below), whose sum is σ = 1525234865400. Its totient is φ = 1496989775088.

The previous prime is 1511112320231. The next prime is 1511112320279. The reversal of 1511112320243 is 3420232111151.

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 1511112320243 - 2²² = 1511108125939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1511112320143) 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, 7061272418 + ... + 7061272631.

It is an arithmetic number, because the mean of its divisors is an integer number (381308716350).

Almost surely, 2^{1511112320243} is an apocalyptic number.

1511112320243 is a deficient number, since it is larger than the sum of its proper divisors (14122545157).

1511112320243 is a wasteful number, since it uses less digits than its factorization.

1511112320243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14122545156.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 1511112320243 its reverse (3420232111151), we get a palindrome (4931344431394).

The spelling of 1511112320243 in words is "one trillion, five hundred eleven billion, one hundred twelve million, three hundred twenty thousand, two hundred forty-three".