210131399 has 8 divisors (see below), whose sum is σ = 217794720. Its totient is φ = 202572576.

The previous prime is 210131371. The next prime is 210131413. The reversal of 210131399 is 993131012.

210131399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-210131399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210131359) 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, 22019 + ... + 30084.

It is an arithmetic number, because the mean of its divisors is an integer number (27224340).

Almost surely, 2^210131399 is an apocalyptic number.

210131399 is a deficient number, since it is larger than the sum of its proper divisors (7663321).

210131399 is a wasteful number, since it uses less digits than its factorization.

210131399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52249.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 210131399 is about 14495.9097334386. The cubic root of 210131399 is about 594.5161417142.

The spelling of 210131399 in words is "two hundred ten million, one hundred thirty-one thousand, three hundred ninety-nine".