213455000 has 80 divisors (see below), whose sum is σ = 545731560. Its totient is φ = 77600000.

The previous prime is 213454991. The next prime is 213455023. The reversal of 213455000 is 554312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53060 + ... + 56940.

Almost surely, 2^213455000 is an apocalyptic number.

213455000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213455000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272865780).

213455000 is an abundant number, since it is smaller than the sum of its proper divisors (332276560).

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

213455000 is a wasteful number, since it uses less digits than its factorization.

213455000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918 (or 3899 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 213455000 is about 14610.0992467539. The cubic root of 213455000 is about 597.6342024490.

The spelling of 213455000 in words is "two hundred thirteen million, four hundred fifty-five thousand".