210208131 has 24 divisors (see below), whose sum is σ = 348075104. Its totient is φ = 119750400.

The previous prime is 210208127. The next prime is 210208139. The reversal of 210208131 is 131802012.

It is not a de Polignac number, because 210208131 - 2² = 210208127 is a prime.

It is a super-2 number, since 2×210208131² = 88374916677026322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210208139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16281 + ... + 26181.

Almost surely, 2^210208131 is an apocalyptic number.

210208131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210208131 is a deficient number, since it is larger than the sum of its proper divisors (137866973).

210208131 is a wasteful number, since it uses less digits than its factorization.

210208131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10251 (or 10248 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 210208131 is about 14498.5561694949. The cubic root of 210208131 is about 594.5884978070.

The spelling of 210208131 in words is "two hundred ten million, two hundred eight thousand, one hundred thirty-one".