115221719 has 8 divisors (see below), whose sum is σ = 121443840. Its totient is φ = 109015416.

The previous prime is 115221703. The next prime is 115221731. The reversal of 115221719 is 917122511.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 115221719 - 2⁴ = 115221703 is a prime.

It is a super-2 number, since 2×115221719² = 26552089058629922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115221691 and 115221700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115221739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12884 + ... + 19910.

It is an arithmetic number, because the mean of its divisors is an integer number (15180480).

Almost surely, 2^115221719 is an apocalyptic number.

115221719 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

115221719 is a deficient number, since it is larger than the sum of its proper divisors (6222121).

115221719 is an equidigital number, since it uses as much as digits as its factorization.

115221719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909.

The product of its digits is 1260, while the sum is 29.

The square root of 115221719 is about 10734.1380184904. The cubic root of 115221719 is about 486.6067362765.

The spelling of 115221719 in words is "one hundred fifteen million, two hundred twenty-one thousand, seven hundred nineteen".