168742231 has 6 divisors (see below), whose sum is σ = 196292040. Its totient is φ = 144636156.

The previous prime is 168742219. The next prime is 168742291. The reversal of 168742231 is 132247861.

It is not a de Polignac number, because 168742231 - 2⁵ = 168742199 is a prime.

It is a super-2 number, since 2×168742231² = 56947881045714722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168742291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1721811 + ... + 1721908.

It is an arithmetic number, because the mean of its divisors is an integer number (32715340).

Almost surely, 2^168742231 is an apocalyptic number.

168742231 is a deficient number, since it is larger than the sum of its proper divisors (27549809).

168742231 is an equidigital number, since it uses as much as digits as its factorization.

168742231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3443733 (or 3443726 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 168742231 is about 12990.0820243754. The cubic root of 168742231 is about 552.5962442983.

The spelling of 168742231 in words is "one hundred sixty-eight million, seven hundred forty-two thousand, two hundred thirty-one".