115731000 has 384 divisors, whose sum is σ = 490613760. Its totient is φ = 23904000.

The previous prime is 115730947. The next prime is 115731013. The reversal of 115731000 is 137511.

It is a happy number.

It is a super-2 number, since 2×115731000² = 26787328722000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 692917 + ... + 693083.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^115731000 is an apocalyptic number.

115731000 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 115731000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245306880).

115731000 is an abundant number, since it is smaller than the sum of its proper divisors (374882760).

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

115731000 is a wasteful number, since it uses less digits than its factorization.

115731000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 18.

The square root of 115731000 is about 10757.8343545530. The cubic root of 115731000 is about 487.3226179112.

Adding to 115731000 its reverse (137511), we get a palindrome (115868511).

The spelling of 115731000 in words is "one hundred fifteen million, seven hundred thirty-one thousand".