216091602 has 24 divisors (see below), whose sum is σ = 469807884. Its totient is φ = 71782944.

The previous prime is 216091597. The next prime is 216091639. The reversal of 216091602 is 206190612.

216091602 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 146385801 + 69705801 = 12099^2 + 8349^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15213 + ... + 25760.

Almost surely, 2^216091602 is an apocalyptic number.

216091602 is an abundant number, since it is smaller than the sum of its proper divisors (253716282).

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

216091602 is a wasteful number, since it uses less digits than its factorization.

216091602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41274 (or 41271 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 216091602 is about 14700.0544896949. The cubic root of 216091602 is about 600.0848046797.

The spelling of 216091602 in words is "two hundred sixteen million, ninety-one thousand, six hundred two".