102131198 has 8 divisors (see below), whose sum is σ = 164981208. Its totient is φ = 47137464.

The previous prime is 102131177. The next prime is 102131209. The reversal of 102131198 is 891131201.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 3928123 = 102131198 / (1 + 0 + 2 + 1 + 3 + 1 + 1 + 9 + 8).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1964036 + ... + 1964087.

It is an arithmetic number, because the mean of its divisors is an integer number (20622651).

Almost surely, 2^102131198 is an apocalyptic number.

102131198 is a deficient number, since it is larger than the sum of its proper divisors (62850010).

102131198 is a wasteful number, since it uses less digits than its factorization.

102131198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928138.

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

The square root of 102131198 is about 10105.9981199286. The cubic root of 102131198 is about 467.4331138641.

Adding to 102131198 its reverse (891131201), we get a palindrome (993262399).

It can be divided in two parts, 10213 and 1198, that added together give a palindrome (11411).

The spelling of 102131198 in words is "one hundred two million, one hundred thirty-one thousand, one hundred ninety-eight".