216498465 has 24 divisors (see below), whose sum is σ = 376022400. Its totient is φ = 115232544.

The previous prime is 216498461. The next prime is 216498467. The reversal of 216498465 is 564894612.

It is not a de Polignac number, because 216498465 - 2² = 216498461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 216498465.

It is not an unprimeable number, because it can be changed into a prime (216498461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18936 + ... + 28134.

It is an arithmetic number, because the mean of its divisors is an integer number (15667600).

Almost surely, 2^216498465 is an apocalyptic number.

It is an amenable number.

216498465 is a deficient number, since it is larger than the sum of its proper divisors (159523935).

216498465 is a wasteful number, since it uses less digits than its factorization.

216498465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9733 (or 9730 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 216498465 is about 14713.8868080463. The cubic root of 216498465 is about 600.4611870866.

The spelling of 216498465 in words is "two hundred sixteen million, four hundred ninety-eight thousand, four hundred sixty-five".