213351840 has 384 divisors, whose sum is σ = 838252800. Its totient is φ = 50319360.

The previous prime is 213351839. The next prime is 213351851. The reversal of 213351840 is 48153312.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1628575 + ... + 1628705.

It is an arithmetic number, because the mean of its divisors is an integer number (2182950).

Almost surely, 2^213351840 is an apocalyptic number.

213351840 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 213351840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419126400).

213351840 is an abundant number, since it is smaller than the sum of its proper divisors (624900960).

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

213351840 is a wasteful number, since it uses less digits than its factorization.

213351840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 213351840 is about 14606.5683854901. The cubic root of 213351840 is about 597.5379106796.

The spelling of 213351840 in words is "two hundred thirteen million, three hundred fifty-one thousand, eight hundred forty".