172235453 has 4 divisors (see below), whose sum is σ = 185484348. Its totient is φ = 158986560.

The previous prime is 172235443. The next prime is 172235471. The reversal of 172235453 is 354532271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354532271 = 257 ⋅1379503.

It can be written as a sum of positive squares in 2 ways, for example, as 32924644 + 139310809 = 5738^2 + 11803^2 .

It is a cyclic number.

It is not a de Polignac number, because 172235453 - 2⁸ = 172235197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172235443) 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, 6624428 + ... + 6624453.

It is an arithmetic number, because the mean of its divisors is an integer number (46371087).

Almost surely, 2^172235453 is an apocalyptic number.

172235453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

172235453 is a deficient number, since it is larger than the sum of its proper divisors (13248895).

172235453 is a wasteful number, since it uses less digits than its factorization.

172235453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13248894.

The product of its digits is 25200, while the sum is 32.

The square root of 172235453 is about 13123.8505401426. The cubic root of 172235453 is about 556.3834253345.

The spelling of 172235453 in words is "one hundred seventy-two million, two hundred thirty-five thousand, four hundred fifty-three".