15242140345 has 8 divisors (see below), whose sum is σ = 18307248264. Its totient is φ = 12182592384.

The previous prime is 15242140321. The next prime is 15242140349. The reversal of 15242140345 is 54304124251.

It can be written as a sum of positive squares in 4 ways, for example, as 1063999161 + 14178141184 = 32619^2 + 119072^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15242140345 - 2⁷ = 15242140217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15242140349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1383954 + ... + 1394923.

It is an arithmetic number, because the mean of its divisors is an integer number (2288406033).

Almost surely, 2^15242140345 is an apocalyptic number.

It is an amenable number.

15242140345 is a deficient number, since it is larger than the sum of its proper divisors (3065107919).

15242140345 is a wasteful number, since it uses less digits than its factorization.

15242140345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779979.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 15242140345 its reverse (54304124251), we get a palindrome (69546264596).

The spelling of 15242140345 in words is "fifteen billion, two hundred forty-two million, one hundred forty thousand, three hundred forty-five".