131664146 has 4 divisors (see below), whose sum is σ = 197496222. Its totient is φ = 65832072.

The previous prime is 131664119. The next prime is 131664149. The reversal of 131664146 is 641466131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641466131 = 43 ⋅14917817.

It can be written as a sum of positive squares in only one way, i.e., 130074025 + 1590121 = 11405^2 + 1261^2 .

It is not an unprimeable number, because it can be changed into a prime (131664149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32916035 + ... + 32916038.

Almost surely, 2^131664146 is an apocalyptic number.

131664146 is a deficient number, since it is larger than the sum of its proper divisors (65832076).

131664146 is an equidigital number, since it uses as much as digits as its factorization.

131664146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65832075.

The product of its digits is 10368, while the sum is 32.

The square root of 131664146 is about 11474.4998148067. The cubic root of 131664146 is about 508.7321397018.

The spelling of 131664146 in words is "one hundred thirty-one million, six hundred sixty-four thousand, one hundred forty-six".