12215432391 has 8 divisors (see below), whose sum is σ = 16293713904. Its totient is φ = 8140386240.

The previous prime is 12215432351. The next prime is 12215432401. The reversal of 12215432391 is 19323451221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12215432391 - 2¹⁰ = 12215431367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215432321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 800016 + ... + 815141.

It is an arithmetic number, because the mean of its divisors is an integer number (2036714238).

Almost surely, 2^12215432391 is an apocalyptic number.

12215432391 is a deficient number, since it is larger than the sum of its proper divisors (4078281513).

12215432391 is a wasteful number, since it uses less digits than its factorization.

12215432391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617681.

The product of its digits is 12960, while the sum is 33.

The spelling of 12215432391 in words is "twelve billion, two hundred fifteen million, four hundred thirty-two thousand, three hundred ninety-one".