216920601 has 12 divisors (see below), whose sum is σ = 314232100. Its totient is φ = 144197280.

The previous prime is 216920597. The next prime is 216920611. The reversal of 216920601 is 106029612.

It can be written as a sum of positive squares in 2 ways, for example, as 150921225 + 65999376 = 12285^2 + 8124^2 .

It is not a de Polignac number, because 216920601 - 2² = 216920597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216920611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31390 + ... + 37671.

Almost surely, 2^216920601 is an apocalyptic number.

It is an amenable number.

216920601 is a deficient number, since it is larger than the sum of its proper divisors (97311499).

216920601 is a wasteful number, since it uses less digits than its factorization.

216920601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69416 (or 69413 counting only the distinct ones).

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

The square root of 216920601 is about 14728.2246384281. The cubic root of 216920601 is about 600.8512001927.

The spelling of 216920601 in words is "two hundred sixteen million, nine hundred twenty thousand, six hundred one".