215432121234 has 96 divisors (see below), whose sum is σ = 479111488128. Its totient is φ = 64526457600.

The previous prime is 215432121227. The next prime is 215432121251. The reversal of 215432121234 is 432121234512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21939894 + ... + 21949710.

It is an arithmetic number, because the mean of its divisors is an integer number (4990744668).

Almost surely, 2^215432121234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215432121234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239555744064).

215432121234 is an abundant number, since it is smaller than the sum of its proper divisors (263679366894).

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

215432121234 is a wasteful number, since it uses less digits than its factorization.

215432121234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10192 (or 10181 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 215432121234 its reverse (432121234512), we get a palindrome (647553355746).

The spelling of 215432121234 in words is "two hundred fifteen billion, four hundred thirty-two million, one hundred twenty-one thousand, two hundred thirty-four".