210131340 has 24 divisors (see below), whose sum is σ = 588367920. Its totient is φ = 56035008.

The previous prime is 210131323. The next prime is 210131347. The reversal of 210131340 is 43131012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (210131347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1751035 + ... + 1751154.

It is an arithmetic number, because the mean of its divisors is an integer number (24515330).

Almost surely, 2^210131340 is an apocalyptic number.

210131340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210131340 is an abundant number, since it is smaller than the sum of its proper divisors (378236580).

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

210131340 is a wasteful number, since it uses less digits than its factorization.

210131340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3502201 (or 3502199 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 210131340 is about 14495.9076983816. The cubic root of 210131340 is about 594.5160860721.

Adding to 210131340 its reverse (43131012), we get a palindrome (253262352).

The spelling of 210131340 in words is "two hundred ten million, one hundred thirty-one thousand, three hundred forty".