115721330 has 8 divisors (see below), whose sum is σ = 208298412. Its totient is φ = 46288528.

The previous prime is 115721327. The next prime is 115721351. The reversal of 115721330 is 33127511.

It can be written as a sum of positive squares in 2 ways, for example, as 115713049 + 8281 = 10757^2 + 91^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 115721296 and 115721305.

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, 5786057 + ... + 5786076.

Almost surely, 2^115721330 is an apocalyptic number.

115721330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115721330 is a deficient number, since it is larger than the sum of its proper divisors (92577082).

115721330 is a wasteful number, since it uses less digits than its factorization.

115721330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11572140.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 115721330 is about 10757.3849052639. The cubic root of 115721330 is about 487.3090446509.

Adding to 115721330 its reverse (33127511), we get a palindrome (148848841).

The spelling of 115721330 in words is "one hundred fifteen million, seven hundred twenty-one thousand, three hundred thirty".