216464541 has 16 divisors (see below), whose sum is σ = 297085824. Its totient is φ = 140094144.

The previous prime is 216464527. The next prime is 216464551. The reversal of 216464541 is 145464612.

It is not a de Polignac number, because 216464541 - 2⁵ = 216464509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216464551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53895 + ... + 57771.

It is an arithmetic number, because the mean of its divisors is an integer number (18567864).

Almost surely, 2^216464541 is an apocalyptic number.

It is an amenable number.

216464541 is a deficient number, since it is larger than the sum of its proper divisors (80621283).

216464541 is a wasteful number, since it uses less digits than its factorization.

216464541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4420.

The product of its digits is 23040, while the sum is 33.

The square root of 216464541 is about 14712.7339743502. The cubic root of 216464541 is about 600.4298225696.

The spelling of 216464541 in words is "two hundred sixteen million, four hundred sixty-four thousand, five hundred forty-one".