166131203 has 8 divisors (see below), whose sum is σ = 193447008. Its totient is φ = 139711104.

The previous prime is 166131167. The next prime is 166131211. The reversal of 166131203 is 302131661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166131203 - 2²⁴ = 149353987 is a prime.

It is a super-2 number, since 2×166131203² = 55199153220454418, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (166131103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223526 + ... + 224267.

It is an arithmetic number, because the mean of its divisors is an integer number (24180876).

Almost surely, 2^166131203 is an apocalyptic number.

166131203 is a deficient number, since it is larger than the sum of its proper divisors (27315805).

166131203 is an equidigital number, since it uses as much as digits as its factorization.

166131203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447853.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 166131203 is about 12889.1893849070. The cubic root of 166131203 is about 549.7312218409.

Adding to 166131203 its reverse (302131661), we get a palindrome (468262864).

The spelling of 166131203 in words is "one hundred sixty-six million, one hundred thirty-one thousand, two hundred three".