15123314310242 has 4 divisors (see below), whose sum is σ = 22684971465366. Its totient is φ = 7561657155120.

The previous prime is 15123314310241. The next prime is 15123314310257. The reversal of 15123314310242 is 24201341332151.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 12124525956841 + 2998788353401 = 3482029^2 + 1731701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15123314310199 and 15123314310208.

It is not an unprimeable number, because it can be changed into a prime (15123314310241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3780828577559 + ... + 3780828577562.

Almost surely, 2^{15123314310242} is an apocalyptic number.

15123314310242 is a deficient number, since it is larger than the sum of its proper divisors (7561657155124).

15123314310242 is an equidigital number, since it uses as much as digits as its factorization.

15123314310242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7561657155123.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 15123314310242 its reverse (24201341332151), we get a palindrome (39324655642393).

The spelling of 15123314310242 in words is "fifteen trillion, one hundred twenty-three billion, three hundred fourteen million, three hundred ten thousand, two hundred forty-two".