131636426 has 4 divisors (see below), whose sum is σ = 197454642. Its totient is φ = 65818212.

The previous prime is 131636419. The next prime is 131636437. The reversal of 131636426 is 624636131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624636131 = 7 ⋅89233733.

It can be written as a sum of positive squares in only one way, i.e., 89321401 + 42315025 = 9451^2 + 6505^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131636392 and 131636401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32909105 + ... + 32909108.

Almost surely, 2^131636426 is an apocalyptic number.

131636426 is a deficient number, since it is larger than the sum of its proper divisors (65818216).

131636426 is an equidigital number, since it uses as much as digits as its factorization.

131636426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65818215.

The product of its digits is 15552, while the sum is 32.

The square root of 131636426 is about 11473.2918554354. The cubic root of 131636426 is about 508.6964351077.

The spelling of 131636426 in words is "one hundred thirty-one million, six hundred thirty-six thousand, four hundred twenty-six".