166231000 has 128 divisors (see below), whose sum is σ = 441604800. Its totient is φ = 58060800.

The previous prime is 166230923. The next prime is 166231003. The reversal of 166231000 is 132661.

It is a super-2 number, since 2×166231000² = 55265490722000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166231003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246664 + ... + 247336.

Almost surely, 2^166231000 is an apocalyptic number.

166231000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220802400).

166231000 is an abundant number, since it is smaller than the sum of its proper divisors (275373800).

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

166231000 is a wasteful number, since it uses less digits than its factorization.

166231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 166231000 is about 12893.0601487777. The cubic root of 166231000 is about 549.8412765127.

Adding to 166231000 its reverse (132661), we get a palindrome (166363661).

The spelling of 166231000 in words is "one hundred sixty-six million, two hundred thirty-one thousand".