171924545 has 12 divisors (see below), whose sum is σ = 223401276. Its totient is φ = 126959040.

The previous prime is 171924503. The next prime is 171924551. The reversal of 171924545 is 545429171.

171924545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 13112²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 3236401 + 168688144 = 1799^2 + 12988^2 .

It is not a de Polignac number, because 171924545 - 2¹² = 171920449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171924499 and 171924508.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100886 + ... + 102575.

It is an arithmetic number, because the mean of its divisors is an integer number (18616773).

Almost surely, 2^171924545 is an apocalyptic number.

It is an amenable number.

171924545 is a deficient number, since it is larger than the sum of its proper divisors (51476731).

171924545 is a wasteful number, since it uses less digits than its factorization.

171924545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203492 (or 203479 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 171924545 is about 13112.0000381330. Note that the first 4 decimals coincide. The cubic root of 171924545 is about 556.0484415552.

The spelling of 171924545 in words is "one hundred seventy-one million, nine hundred twenty-four thousand, five hundred forty-five".