213540544 has 56 divisors (see below), whose sum is σ = 509788160. Its totient is φ = 86697216.

The previous prime is 213540541. The next prime is 213540559. The reversal of 213540544 is 445045312.

213540544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (213540541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4032 + ... + 21055.

It is an arithmetic number, because the mean of its divisors is an integer number (9103360).

Almost surely, 2^213540544 is an apocalyptic number.

It is an amenable number.

213540544 is an abundant number, since it is smaller than the sum of its proper divisors (296247616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213540544 is a wasteful number, since it uses less digits than its factorization.

213540544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25125 (or 25115 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 213540544 is about 14613.0265174604. The cubic root of 213540544 is about 597.7140275366.

Adding to 213540544 its reverse (445045312), we get a palindrome (658585856).

The spelling of 213540544 in words is "two hundred thirteen million, five hundred forty thousand, five hundred forty-four".