210198131 has 16 divisors (see below), whose sum is σ = 251004768. Its totient is φ = 173491200.

The previous prime is 210198113. The next prime is 210198137. The reversal of 210198131 is 131891012.

It is a cyclic number.

It is not a de Polignac number, because 210198131 - 2⁶ = 210198067 is a prime.

It is a super-2 number, since 2×210198131² = 88366508551786322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210198131.

It is not an unprimeable number, because it can be changed into a prime (210198137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3326 + ... + 20771.

It is an arithmetic number, because the mean of its divisors is an integer number (15687798).

Almost surely, 2^210198131 is an apocalyptic number.

210198131 is a deficient number, since it is larger than the sum of its proper divisors (40806637).

210198131 is a wasteful number, since it uses less digits than its factorization.

210198131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24182.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 210198131 is about 14498.2113034677. The cubic root of 210198131 is about 594.5790690895.

It can be divided in two parts, 2101981 and 31, that added together give a palindrome (2102012).

The spelling of 210198131 in words is "two hundred ten million, one hundred ninety-eight thousand, one hundred thirty-one".