215536133 has 6 divisors (see below), whose sum is σ = 227477574. Its totient is φ = 204191784.

The previous prime is 215536129. The next prime is 215536141. The reversal of 215536133 is 331635512.

It can be written as a sum of positive squares in only one way, i.e., 210163009 + 5373124 = 14497^2 + 2318^2 .

It is not a de Polignac number, because 215536133 - 2² = 215536129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215536096 and 215536105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215536103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298166 + ... + 298887.

It is an arithmetic number, because the mean of its divisors is an integer number (37912929).

Almost surely, 2^215536133 is an apocalyptic number.

It is an amenable number.

215536133 is a deficient number, since it is larger than the sum of its proper divisors (11941441).

215536133 is an equidigital number, since it uses as much as digits as its factorization.

215536133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597091 (or 597072 counting only the distinct ones).

The product of its digits is 8100, while the sum is 29.

The square root of 215536133 is about 14681.1488991836. The cubic root of 215536133 is about 599.5701856915.

The spelling of 215536133 in words is "two hundred fifteen million, five hundred thirty-six thousand, one hundred thirty-three".