15340454242 has 4 divisors (see below), whose sum is σ = 23010681366. Its totient is φ = 7670227120.

The previous prime is 15340454231. The next prime is 15340454273. The reversal of 15340454242 is 24245404351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24245404351 = 7 ⋅3463629193.

It can be written as a sum of positive squares in only one way, i.e., 12669528481 + 2670925761 = 112559^2 + 51681^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15340454198 and 15340454207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3835113559 + ... + 3835113562.

Almost surely, 2^15340454242 is an apocalyptic number.

15340454242 is a deficient number, since it is larger than the sum of its proper divisors (7670227124).

15340454242 is an equidigital number, since it uses as much as digits as its factorization.

15340454242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7670227123.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 15340454242 its reverse (24245404351), we get a palindrome (39585858593).

The spelling of 15340454242 in words is "fifteen billion, three hundred forty million, four hundred fifty-four thousand, two hundred forty-two".