172533387 has 8 divisors (see below), whose sum is σ = 247740304. Its totient is φ = 106174368.

The previous prime is 172533377. The next prime is 172533407. The reversal of 172533387 is 783335271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172533387 - 2⁸ = 172533131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 4423933 = 172533387 / (1 + 7 + 2 + 5 + 3 + 3 + 3 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172533377) 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, 2211928 + ... + 2212005.

It is an arithmetic number, because the mean of its divisors is an integer number (30967538).

Almost surely, 2^172533387 is an apocalyptic number.

172533387 is a deficient number, since it is larger than the sum of its proper divisors (75206917).

172533387 is a wasteful number, since it uses less digits than its factorization.

172533387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423949.

The product of its digits is 105840, while the sum is 39.

The square root of 172533387 is about 13135.1964964366. The cubic root of 172533387 is about 556.7040524132.

The spelling of 172533387 in words is "one hundred seventy-two million, five hundred thirty-three thousand, three hundred eighty-seven".