172431533 has 4 divisors (see below), whose sum is σ = 172457820. Its totient is φ = 172405248.

The previous prime is 172431491. The next prime is 172431547. The reversal of 172431533 is 335134271.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8514724 + 163916809 = 2918^2 + 12803^2 .

It is a cyclic number.

It is not a de Polignac number, because 172431533 - 2¹⁶ = 172365997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172431496 and 172431505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172431563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5741 + ... + 19437.

It is an arithmetic number, because the mean of its divisors is an integer number (43114455).

Almost surely, 2^172431533 is an apocalyptic number.

It is an amenable number.

172431533 is a deficient number, since it is larger than the sum of its proper divisors (26287).

172431533 is a wasteful number, since it uses less digits than its factorization.

172431533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26286.

The product of its digits is 7560, while the sum is 29.

The square root of 172431533 is about 13131.3187837323. The cubic root of 172431533 is about 556.5944819368.

The spelling of 172431533 in words is "one hundred seventy-two million, four hundred thirty-one thousand, five hundred thirty-three".