215432354512 has 20 divisors (see below), whose sum is σ = 423117999940. Its totient is φ = 106240612608.

The previous prime is 215432354503. The next prime is 215432354513. The reversal of 215432354512 is 215453234512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 148135693456 + 67296661056 = 384884^2 + 259416^2 .

It is a super-2 number, since 2×215432354512² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215432354513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92221587 + ... + 92223922.

It is an arithmetic number, because the mean of its divisors is an integer number (21155899997).

Almost surely, 2^215432354512 is an apocalyptic number.

It is an amenable number.

215432354512 is a deficient number, since it is larger than the sum of its proper divisors (207685645428).

215432354512 is a wasteful number, since it uses less digits than its factorization.

215432354512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184445590 (or 184445584 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The spelling of 215432354512 in words is "two hundred fifteen billion, four hundred thirty-two million, three hundred fifty-four thousand, five hundred twelve".