115131720 has 64 divisors (see below), whose sum is σ = 376799040. Its totient is φ = 27910400.

The previous prime is 115131703. The next prime is 115131727. The reversal of 115131720 is 27131511.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (115131727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42291 + ... + 44930.

It is an arithmetic number, because the mean of its divisors is an integer number (5887485).

Almost surely, 2^115131720 is an apocalyptic number.

115131720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115131720 is an abundant number, since it is smaller than the sum of its proper divisors (261667320).

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

115131720 is a wasteful number, since it uses less digits than its factorization.

115131720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87246 (or 87242 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 115131720 is about 10729.9450138386. The cubic root of 115131720 is about 486.4800080652.

The spelling of 115131720 in words is "one hundred fifteen million, one hundred thirty-one thousand, seven hundred twenty".