166200431 has 4 divisors (see below), whose sum is σ = 166677000. Its totient is φ = 165723864.

The previous prime is 166200383. The next prime is 166200443. The reversal of 166200431 is 134002661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134002661 = 13 ⋅10307897.

It is a cyclic number.

It is not a de Polignac number, because 166200431 - 2¹⁴ = 166184047 is a prime.

It is a super-2 number, since 2×166200431² = 55245166529171522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166200397 and 166200406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166200451) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 237761 + ... + 238458.

It is an arithmetic number, because the mean of its divisors is an integer number (41669250).

Almost surely, 2^166200431 is an apocalyptic number.

166200431 is a deficient number, since it is larger than the sum of its proper divisors (476569).

166200431 is an equidigital number, since it uses as much as digits as its factorization.

166200431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476568.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 166200431 is about 12891.8746115528. The cubic root of 166200431 is about 549.8075701475.

The spelling of 166200431 in words is "one hundred sixty-six million, two hundred thousand, four hundred thirty-one".