115731001 has 4 divisors (see below), whose sum is σ = 116028900. Its totient is φ = 115433104.

The previous prime is 115730947. The next prime is 115731013. The reversal of 115731001 is 100137511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100137511 = 53 ⋅1889387.

It can be written as a sum of positive squares in 2 ways, for example, as 81812025 + 33918976 = 9045^2 + 5824^2 .

It is a cyclic number.

It is not a de Polignac number, because 115731001 - 2¹⁹ = 115206713 is a prime.

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 115731001.

It is not an unprimeable number, because it can be changed into a prime (115731041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148366 + ... + 149143.

It is an arithmetic number, because the mean of its divisors is an integer number (29007225).

Almost surely, 2^115731001 is an apocalyptic number.

It is an amenable number.

115731001 is a deficient number, since it is larger than the sum of its proper divisors (297899).

115731001 is an equidigital number, since it uses as much as digits as its factorization.

115731001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297898.

The product of its (nonzero) digits is 105, while the sum is 19.

The square root of 115731001 is about 10757.8344010307. The cubic root of 115731001 is about 487.3226193148.

Adding to 115731001 its reverse (100137511), we get a palindrome (215868512).

The spelling of 115731001 in words is "one hundred fifteen million, seven hundred thirty-one thousand, one".