172011533 has 2 divisors, whose sum is σ = 172011534. Its totient is φ = 172011532.

The previous prime is 172011517. The next prime is 172011569. The reversal of 172011533 is 335110271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145612489 + 26399044 = 12067^2 + 5138^2 .

It is a cyclic number.

It is not a de Polignac number, because 172011533 - 2⁴ = 172011517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172011499 and 172011508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172014533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86005766 + 86005767.

It is an arithmetic number, because the mean of its divisors is an integer number (86005767).

Almost surely, 2^172011533 is an apocalyptic number.

It is an amenable number.

172011533 is a deficient number, since it is larger than the sum of its proper divisors (1).

172011533 is an equidigital number, since it uses as much as digits as its factorization.

172011533 is an odious number, because the sum of its binary digits is odd.

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

The square root of 172011533 is about 13115.3167327366. The cubic root of 172011533 is about 556.1422063059.

The spelling of 172011533 in words is "one hundred seventy-two million, eleven thousand, five hundred thirty-three".