215205412432040 has 32 divisors (see below), whose sum is σ = 500909149629000. Its totient is φ = 83113814456064.

The previous prime is 215205412432009. The next prime is 215205412432079. The reversal of 215205412432040 is 40234214502512.

It can be written as a sum of positive squares in 4 ways, for example, as 193158462237316 + 22046950194724 = 13898146^2 + 4695418^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92760952475 + ... + 92760954794.

Almost surely, 2^{215205412432040} is an apocalyptic number.

215205412432040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215205412432040 is an abundant number, since it is smaller than the sum of its proper divisors (285703737196960).

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

215205412432040 is a wasteful number, since it uses less digits than its factorization.

215205412432040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185521907309 (or 185521907305 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 215205412432040 its reverse (40234214502512), we get a palindrome (255439626934552).

The spelling of 215205412432040 in words is "two hundred fifteen trillion, two hundred five billion, four hundred twelve million, four hundred thirty-two thousand, forty".