54216645 has 16 divisors (see below), whose sum is σ = 99139200. Its totient is φ = 24784704.

The previous prime is 54216641. The next prime is 54216649. The reversal of 54216645 is 54661245.

It is an interprime number because it is at equal distance from previous prime (54216641) and next prime (54216649).

It is not a de Polignac number, because 54216645 - 2² = 54216641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54216641) 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, 258070 + ... + 258279.

It is an arithmetic number, because the mean of its divisors is an integer number (6196200).

Almost surely, 2^54216645 is an apocalyptic number.

It is an amenable number.

54216645 is a deficient number, since it is larger than the sum of its proper divisors (44922555).

54216645 is a wasteful number, since it uses less digits than its factorization.

54216645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516364.

The product of its digits is 28800, while the sum is 33.

The square root of 54216645 is about 7363.1952982384. The cubic root of 54216645 is about 378.4811138198.

The spelling of 54216645 in words is "fifty-four million, two hundred sixteen thousand, six hundred forty-five".