15040340242 has 4 divisors (see below), whose sum is σ = 22560510366. Its totient is φ = 7520170120.

The previous prime is 15040340191. The next prime is 15040340281. The reversal of 15040340242 is 24204304051.

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., 9055615921 + 5984724321 = 95161^2 + 77361^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3760085059 + ... + 3760085062.

Almost surely, 2^15040340242 is an apocalyptic number.

15040340242 is a deficient number, since it is larger than the sum of its proper divisors (7520170124).

15040340242 is an equidigital number, since it uses as much as digits as its factorization.

15040340242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7520170123.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 15040340242 its reverse (24204304051), we get a palindrome (39244644293).

The spelling of 15040340242 in words is "fifteen billion, forty million, three hundred forty thousand, two hundred forty-two".