215543132 has 12 divisors (see below), whose sum is σ = 431086320. Its totient is φ = 92375616.

The previous prime is 215543131. The next prime is 215543147. The reversal of 215543132 is 231345512.

It is a happy number.

215543132 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215543131) 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, 3848957 + ... + 3849012.

It is an arithmetic number, because the mean of its divisors is an integer number (35923860).

Almost surely, 2^215543132 is an apocalyptic number.

It is an amenable number.

215543132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

215543132 is a wasteful number, since it uses less digits than its factorization.

215543132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7697980 (or 7697978 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 215543132 is about 14681.3872641518. The cubic root of 215543132 is about 599.5766754716.

Adding to 215543132 its reverse (231345512), we get a palindrome (446888644).

The spelling of 215543132 in words is "two hundred fifteen million, five hundred forty-three thousand, one hundred thirty-two".