215231401424 has 160 divisors (see below), whose sum is σ = 502190357760. Its totient is φ = 88280064000.

The previous prime is 215231401421. The next prime is 215231401453. The reversal of 215231401424 is 424104132512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215231401421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20889074 + ... + 20899374.

It is an arithmetic number, because the mean of its divisors is an integer number (3138689736).

Almost surely, 2^215231401424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215231401424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251095178880).

215231401424 is an abundant number, since it is smaller than the sum of its proper divisors (286958956336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215231401424 is a wasteful number, since it uses less digits than its factorization.

215231401424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10669 (or 10663 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 215231401424 its reverse (424104132512), we get a palindrome (639335533936).

The spelling of 215231401424 in words is "two hundred fifteen billion, two hundred thirty-one million, four hundred one thousand, four hundred twenty-four".