195631000 has 64 divisors (see below), whose sum is σ = 463488480. Its totient is φ = 77276800.

The previous prime is 195630997. The next prime is 195631001. The reversal of 195631000 is 136591.

195631000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×195631000² = 76542976322000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195631001) 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, 81822 + ... + 84178.

Almost surely, 2^195631000 is an apocalyptic number.

195631000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195631000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231744240).

195631000 is an abundant number, since it is smaller than the sum of its proper divisors (267857480).

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

195631000 is a wasteful number, since it uses less digits than its factorization.

195631000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 195631000 is about 13986.8152200564. The cubic root of 195631000 is about 580.5138134136.

Adding to 195631000 its reverse (136591), we get a palindrome (195767591).

The spelling of 195631000 in words is "one hundred ninety-five million, six hundred thirty-one thousand".