210311420 has 96 divisors (see below), whose sum is σ = 520261056. Its totient is φ = 70553600.

The previous prime is 210311407. The next prime is 210311489. The reversal of 210311420 is 24113012.

It is a junction number, because it is equal to n+sod(n) for n = 210311395 and 210311404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197690 + ... + 198750.

It is an arithmetic number, because the mean of its divisors is an integer number (5419386).

Almost surely, 2^210311420 is an apocalyptic number.

210311420 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 210311420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260130528).

210311420 is an abundant number, since it is smaller than the sum of its proper divisors (309949636).

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

210311420 is a wasteful number, since it uses less digits than its factorization.

210311420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 210311420 is about 14502.1177763801. The cubic root of 210311420 is about 594.6858685967.

Adding to 210311420 its reverse (24113012), we get a palindrome (234424432).

The spelling of 210311420 in words is "two hundred ten million, three hundred eleven thousand, four hundred twenty".