2015121343 has 4 divisors (see below), whose sum is σ = 2069584120. Its totient is φ = 1960658568.

The previous prime is 2015121337. The next prime is 2015121371. The reversal of 2015121343 is 3431215102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2015121343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015121313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27231333 + ... + 27231406.

It is an arithmetic number, because the mean of its divisors is an integer number (517396030).

Almost surely, 2^2015121343 is an apocalyptic number.

2015121343 is a deficient number, since it is larger than the sum of its proper divisors (54462777).

2015121343 is an equidigital number, since it uses as much as digits as its factorization.

2015121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54462776.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2015121343 is about 44890.1029515416. The cubic root of 2015121343 is about 1263.0883639736.

Adding to 2015121343 its reverse (3431215102), we get a palindrome (5446336445).

The spelling of 2015121343 in words is "two billion, fifteen million, one hundred twenty-one thousand, three hundred forty-three".