210345320 has 16 divisors (see below), whose sum is σ = 473277060. Its totient is φ = 84138112.

The previous prime is 210345307. The next prime is 210345329. The reversal of 210345320 is 23543012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 190826596 + 19518724 = 13814^2 + 4418^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 210345292 and 210345301.

It is not an unprimeable number, because it can be changed into a prime (210345329) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2629277 + ... + 2629356.

Almost surely, 2^210345320 is an apocalyptic number.

210345320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210345320 is an abundant number, since it is smaller than the sum of its proper divisors (262931740).

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

210345320 is a wasteful number, since it uses less digits than its factorization.

210345320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258644 (or 5258640 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 210345320 is about 14503.2865240952. The cubic root of 210345320 is about 594.7178192596.

Adding to 210345320 its reverse (23543012), we get a palindrome (233888332).

The spelling of 210345320 in words is "two hundred ten million, three hundred forty-five thousand, three hundred twenty".