15214431212 has 24 divisors (see below), whose sum is σ = 26752481280. Its totient is φ = 7570903760.

The previous prime is 15214431209. The next prime is 15214431257. The reversal of 15214431212 is 21213441251.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2106287 + ... + 2113497.

It is an arithmetic number, because the mean of its divisors is an integer number (1114686720).

Almost surely, 2^15214431212 is an apocalyptic number.

It is an amenable number.

15214431212 is a deficient number, since it is larger than the sum of its proper divisors (11538050068).

15214431212 is a wasteful number, since it uses less digits than its factorization.

15214431212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9661 (or 9659 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

Adding to 15214431212 its reverse (21213441251), we get a palindrome (36427872463).

The spelling of 15214431212 in words is "fifteen billion, two hundred fourteen million, four hundred thirty-one thousand, two hundred twelve".