216475242361 has 9 divisors (see below), whose sum is σ = 251821927749. Its totient is φ = 185547416124.

The previous prime is 216475242353. The next prime is 216475242391. The reversal of 216475242361 is 163242574612.

The square root of 216475242361 is 465269.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 216475242361 - 2³ = 216475242353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216475242391) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3223650 + ... + 3290116.

Almost surely, 2^216475242361 is an apocalyptic number.

216475242361 is the 465269-th square number.

216475242361 is the 232635-th centered octagonal number.

It is an amenable number.

216475242361 is a deficient number, since it is larger than the sum of its proper divisors (35346685388).

216475242361 is an frugal number, since it uses more digits than its factorization.

216475242361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132948 (or 66474 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The spelling of 216475242361 in words is "two hundred sixteen billion, four hundred seventy-five million, two hundred forty-two thousand, three hundred sixty-one".