171532157 has 2 divisors, whose sum is σ = 171532158. Its totient is φ = 171532156.

The previous prime is 171532139. The next prime is 171532201. The reversal of 171532157 is 751235171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170720356 + 811801 = 13066^2 + 901^2 .

It is an emirp because it is prime and its reverse (751235171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171532157 - 2⁸ = 171531901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171532457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85766078 + 85766079.

It is an arithmetic number, because the mean of its divisors is an integer number (85766079).

Almost surely, 2^171532157 is an apocalyptic number.

It is an amenable number.

171532157 is a deficient number, since it is larger than the sum of its proper divisors (1).

171532157 is an equidigital number, since it uses as much as digits as its factorization.

171532157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7350, while the sum is 32.

The square root of 171532157 is about 13097.0285561268. The cubic root of 171532157 is about 555.6250912266.

The spelling of 171532157 in words is "one hundred seventy-one million, five hundred thirty-two thousand, one hundred fifty-seven".