15123240212 has 12 divisors (see below), whose sum is σ = 26475466080. Its totient is φ = 7558821336.

The previous prime is 15123240199. The next prime is 15123240217. The reversal of 15123240212 is 21204232151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15123240217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687512 + ... + 709167.

It is an arithmetic number, because the mean of its divisors is an integer number (2206288840).

Almost surely, 2^15123240212 is an apocalyptic number.

It is an amenable number.

15123240212 is a deficient number, since it is larger than the sum of its proper divisors (11352225868).

15123240212 is a wasteful number, since it uses less digits than its factorization.

15123240212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399390 (or 1399388 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 15123240212 its reverse (21204232151), we get a palindrome (36327472363).

The spelling of 15123240212 in words is "fifteen billion, one hundred twenty-three million, two hundred forty thousand, two hundred twelve".