171156540 has 24 divisors (see below), whose sum is σ = 479238480. Its totient is φ = 45641728.

The previous prime is 171156539. The next prime is 171156551. The reversal of 171156540 is 45651171.

It is a super-2 number, since 2×171156540² = 58589122369543200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 171156498 and 171156507.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1426245 + ... + 1426364.

It is an arithmetic number, because the mean of its divisors is an integer number (19968270).

Almost surely, 2^171156540 is an apocalyptic number.

171156540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171156540 is an abundant number, since it is smaller than the sum of its proper divisors (308081940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171156540 is a wasteful number, since it uses less digits than its factorization.

171156540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852621 (or 2852619 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 171156540 is about 13082.6809179159. The cubic root of 171156540 is about 555.2192300047.

The spelling of 171156540 in words is "one hundred seventy-one million, one hundred fifty-six thousand, five hundred forty".