115221533 has 4 divisors (see below), whose sum is σ = 131681760. Its totient is φ = 98761308.

The previous prime is 115221527. The next prime is 115221539. The reversal of 115221533 is 335122511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 335122511 = 7993 ⋅41927.

It is an interprime number because it is at equal distance from previous prime (115221527) and next prime (115221539).

It is a cyclic number.

It is not a de Polignac number, because 115221533 - 2⁴ = 115221517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115221499 and 115221508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115221539) 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, 8230103 + ... + 8230116.

It is an arithmetic number, because the mean of its divisors is an integer number (32920440).

Almost surely, 2^115221533 is an apocalyptic number.

It is an amenable number.

115221533 is a deficient number, since it is larger than the sum of its proper divisors (16460227).

115221533 is an equidigital number, since it uses as much as digits as its factorization.

115221533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16460226.

The product of its digits is 900, while the sum is 23.

The square root of 115221533 is about 10734.1293545401. The cubic root of 115221533 is about 486.6064744367.

The spelling of 115221533 in words is "one hundred fifteen million, two hundred twenty-one thousand, five hundred thirty-three".