171252553 has 4 divisors (see below), whose sum is σ = 171394948. Its totient is φ = 171110160.

The previous prime is 171252551. The next prime is 171252563. The reversal of 171252553 is 355252171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355252171 = 179 ⋅1984649.

It can be written as a sum of positive squares in 2 ways, for example, as 64192144 + 107060409 = 8012^2 + 10347^2 .

It is a cyclic number.

It is not a de Polignac number, because 171252553 - 2¹ = 171252551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171252551) 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, 69378 + ... + 71803.

It is an arithmetic number, because the mean of its divisors is an integer number (42848737).

Almost surely, 2^171252553 is an apocalyptic number.

It is an amenable number.

171252553 is a deficient number, since it is larger than the sum of its proper divisors (142395).

171252553 is a wasteful number, since it uses less digits than its factorization.

171252553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142394.

The product of its digits is 10500, while the sum is 31.

The square root of 171252553 is about 13086.3498730547. The cubic root of 171252553 is about 555.3230303016.

The spelling of 171252553 in words is "one hundred seventy-one million, two hundred fifty-two thousand, five hundred fifty-three".