115533021 has 8 divisors (see below), whose sum is σ = 154474560. Its totient is φ = 76806752.

The previous prime is 115532983. The next prime is 115533023. The reversal of 115533021 is 120335511.

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 115533021 - 2¹¹ = 115530973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115533023) 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, 52560 + ... + 54713.

It is an arithmetic number, because the mean of its divisors is an integer number (19309320).

Almost surely, 2^115533021 is an apocalyptic number.

It is an amenable number.

115533021 is a deficient number, since it is larger than the sum of its proper divisors (38941539).

115533021 is a wasteful number, since it uses less digits than its factorization.

115533021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107635.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 115533021 is about 10748.6287962698. The cubic root of 115533021 is about 487.0445745398.

Adding to 115533021 its reverse (120335511), we get a palindrome (235868532).

The spelling of 115533021 in words is "one hundred fifteen million, five hundred thirty-three thousand, twenty-one".