216387132 has 48 divisors (see below), whose sum is σ = 544760832. Its totient is φ = 66456000.

The previous prime is 216387131. The next prime is 216387133. The reversal of 216387132 is 231783612.

It is an interprime number because it is at equal distance from previous prime (216387131) and next prime (216387133).

It is a junction number, because it is equal to n+sod(n) for n = 216387093 and 216387102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216387131) 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, 116233 + ... + 118079.

It is an arithmetic number, because the mean of its divisors is an integer number (11349184).

Almost surely, 2^216387132 is an apocalyptic number.

It is an amenable number.

216387132 is an abundant number, since it is smaller than the sum of its proper divisors (328373700).

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

216387132 is a wasteful number, since it uses less digits than its factorization.

216387132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618 (or 2616 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 216387132 is about 14710.1030587824. The cubic root of 216387132 is about 600.3582416179.

The spelling of 216387132 in words is "two hundred sixteen million, three hundred eighty-seven thousand, one hundred thirty-two".