213918484 has 48 divisors (see below), whose sum is σ = 415633680. Its totient is φ = 95708160.

The previous prime is 213918461. The next prime is 213918487. The reversal of 213918484 is 484819312.

It can be written as a sum of positive squares in 8 ways, for example, as 92698384 + 121220100 = 9628^2 + 11010^2 .

It is a super-2 number, since 2×213918484² = 91522235593716512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213918487) 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, 573322 + ... + 573694.

It is an arithmetic number, because the mean of its divisors is an integer number (8659035).

Almost surely, 2^213918484 is an apocalyptic number.

It is an amenable number.

213918484 is a deficient number, since it is larger than the sum of its proper divisors (201715196).

213918484 is a wasteful number, since it uses less digits than its factorization.

213918484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 698 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 213918484 is about 14625.9524134328. The cubic root of 213918484 is about 598.0664460120.

The spelling of 213918484 in words is "two hundred thirteen million, nine hundred eighteen thousand, four hundred eighty-four".