210142340 has 24 divisors (see below), whose sum is σ = 444673152. Its totient is φ = 83414240.

The previous prime is 210142319. The next prime is 210142349. The reversal of 210142340 is 43241012.

It is not an unprimeable number, because it can be changed into a prime (210142349) 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, 37484 + ... + 42723.

It is an arithmetic number, because the mean of its divisors is an integer number (18528048).

Almost surely, 2^210142340 is an apocalyptic number.

210142340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210142340 is an abundant number, since it is smaller than the sum of its proper divisors (234530812).

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

210142340 is a wasteful number, since it uses less digits than its factorization.

210142340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80347 (or 80345 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 210142340 is about 14496.2871108432. The cubic root of 210142340 is about 594.5264598426.

Adding to 210142340 its reverse (43241012), we get a palindrome (253383352).

The spelling of 210142340 in words is "two hundred ten million, one hundred forty-two thousand, three hundred forty".