210131994 has 8 divisors (see below), whose sum is σ = 420264000. Its totient is φ = 70043996.

The previous prime is 210131993. The next prime is 210132017. The reversal of 210131994 is 499131012.

It is a sphenic number, since it is the product of 3 distinct primes.

210131994 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (210131993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17510994 + ... + 17511005.

It is an arithmetic number, because the mean of its divisors is an integer number (52533000).

Almost surely, 2^210131994 is an apocalyptic number.

210131994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

210131994 is a wasteful number, since it uses less digits than its factorization.

210131994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35022004.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 210131994 is about 14495.9302564547. The cubic root of 210131994 is about 594.5167028501.

The spelling of 210131994 in words is "two hundred ten million, one hundred thirty-one thousand, nine hundred ninety-four".