213450444 has 24 divisors (see below), whose sum is σ = 553390320. Its totient is φ = 71150112.

The previous prime is 213450439. The next prime is 213450463. The reversal of 213450444 is 444054312.

It is a happy number.

213450444 is a `hidden beast` number, since 213 + 4 + 5 + 0 + 444 = 666.

It is a super-2 number, since 2×213450444² = 91122184087594272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988089 + ... + 988304.

It is an arithmetic number, because the mean of its divisors is an integer number (23057930).

Almost surely, 2^213450444 is an apocalyptic number.

It is an amenable number.

213450444 is an abundant number, since it is smaller than the sum of its proper divisors (339939876).

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

213450444 is a wasteful number, since it uses less digits than its factorization.

213450444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976406 (or 1976398 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 213450444 is about 14609.9433263788. The cubic root of 213450444 is about 597.6299504352.

The spelling of 213450444 in words is "two hundred thirteen million, four hundred fifty thousand, four hundred forty-four".