166531432 has 32 divisors (see below), whose sum is σ = 320443200. Its totient is φ = 81091584.

The previous prime is 166531429. The next prime is 166531451. The reversal of 166531432 is 234135661.

It is a junction number, because it is equal to n+sod(n) for n = 166531394 and 166531403.

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, 198069 + ... + 198907.

It is an arithmetic number, because the mean of its divisors is an integer number (10013850).

Almost surely, 2^166531432 is an apocalyptic number.

It is an amenable number.

166531432 is a deficient number, since it is larger than the sum of its proper divisors (153911768).

166531432 is a wasteful number, since it uses less digits than its factorization.

166531432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465 (or 1461 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 166531432 is about 12904.7058083476. The cubic root of 166531432 is about 550.1723228626.

The spelling of 166531432 in words is "one hundred sixty-six million, five hundred thirty-one thousand, four hundred thirty-two".