216464354 has 4 divisors (see below), whose sum is σ = 324696534. Its totient is φ = 108232176.

The previous prime is 216464341. The next prime is 216464357. The reversal of 216464354 is 453464612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 136773025 + 79691329 = 11695^2 + 8927^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216464357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54116087 + ... + 54116090.

Almost surely, 2^216464354 is an apocalyptic number.

216464354 is a deficient number, since it is larger than the sum of its proper divisors (108232180).

216464354 is a wasteful number, since it uses less digits than its factorization.

216464354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108232179.

The product of its digits is 69120, while the sum is 35.

The square root of 216464354 is about 14712.7276193098. The cubic root of 216464354 is about 600.4296496692.

The spelling of 216464354 in words is "two hundred sixteen million, four hundred sixty-four thousand, three hundred fifty-four".