210002131 has 4 divisors (see below), whose sum is σ = 210744472. Its totient is φ = 209259792.

The previous prime is 210002119. The next prime is 210002141. The reversal of 210002131 is 131200012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210002131 - 2⁵ = 210002099 is a prime.

It is a super-5 number, since 5×210002131⁵ (a number of 43 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210002141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370746 + ... + 371311.

It is an arithmetic number, because the mean of its divisors is an integer number (52686118).

Almost surely, 2^210002131 is an apocalyptic number.

210002131 is a deficient number, since it is larger than the sum of its proper divisors (742341).

210002131 is an equidigital number, since it uses as much as digits as its factorization.

210002131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742340.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 210002131 is about 14491.4502724883. The cubic root of 210002131 is about 594.3942058247.

Adding to 210002131 its reverse (131200012), we get a palindrome (341202143).

The spelling of 210002131 in words is "two hundred ten million, two thousand, one hundred thirty-one".