213013044 has 24 divisors (see below), whose sum is σ = 552256320. Its totient is φ = 71004312.

The previous prime is 213012991. The next prime is 213013049. The reversal of 213013044 is 440310312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213013049) 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, 986064 + ... + 986279.

It is an arithmetic number, because the mean of its divisors is an integer number (23010680).

Almost surely, 2^213013044 is an apocalyptic number.

It is an amenable number.

213013044 is an abundant number, since it is smaller than the sum of its proper divisors (339243276).

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

213013044 is a wasteful number, since it uses less digits than its factorization.

213013044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972356 (or 1972348 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 213013044 is about 14594.9663925615. The cubic root of 213013044 is about 597.2214526534.

Adding to 213013044 its reverse (440310312), we get a palindrome (653323356).

The spelling of 213013044 in words is "two hundred thirteen million, thirteen thousand, forty-four".