171125722442 has 4 divisors (see below), whose sum is σ = 256688583666. Its totient is φ = 85562861220.

The previous prime is 171125722381. The next prime is 171125722447. The reversal of 171125722442 is 244227521171.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 153529965241 + 17595757201 = 391829^2 + 132649^2 .

It is a junction number, because it is equal to n+sod(n) for n = 171125722396 and 171125722405.

It is not an unprimeable number, because it can be changed into a prime (171125722447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42781430609 + ... + 42781430612.

Almost surely, 2^171125722442 is an apocalyptic number.

171125722442 is a deficient number, since it is larger than the sum of its proper divisors (85562861224).

171125722442 is an equidigital number, since it uses as much as digits as its factorization.

171125722442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85562861223.

The product of its digits is 62720, while the sum is 38.

The spelling of 171125722442 in words is "one hundred seventy-one billion, one hundred twenty-five million, seven hundred twenty-two thousand, four hundred forty-two".