215431134512 has 80 divisors (see below), whose sum is σ = 466663203072. Its totient is φ = 95495957760.

The previous prime is 215431134493. The next prime is 215431134517.

215431134512 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (215431134517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4874498 + ... + 4918494.

Almost surely, 2^215431134512 is an apocalyptic number.

215431134512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215431134512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233331601536).

215431134512 is an abundant number, since it is smaller than the sum of its proper divisors (251232068560).

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

215431134512 is a wasteful number, since it uses less digits than its factorization.

215431134512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44706 (or 44700 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

It can be divided in two parts, 215431 and 134512, that added together give a palindrome (349943).

The spelling of 215431134512 in words is "two hundred fifteen billion, four hundred thirty-one million, one hundred thirty-four thousand, five hundred twelve".