216641692 has 12 divisors (see below), whose sum is σ = 395606736. Its totient is φ = 103611200.

The previous prime is 216641627. The next prime is 216641701. The reversal of 216641692 is 296146612.

216641692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×216641692³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177309 + ... + 1177492.

It is an arithmetic number, because the mean of its divisors is an integer number (32967228).

Almost surely, 2^216641692 is an apocalyptic number.

It is an amenable number.

216641692 is a deficient number, since it is larger than the sum of its proper divisors (178965044).

216641692 is a wasteful number, since it uses less digits than its factorization.

216641692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354828 (or 2354826 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 216641692 is about 14718.7530721865. The cubic root of 216641692 is about 600.5935718530.

The spelling of 216641692 in words is "two hundred sixteen million, six hundred forty-one thousand, six hundred ninety-two".