131611622 has 4 divisors (see below), whose sum is σ = 197417436. Its totient is φ = 65805810.

The previous prime is 131611591. The next prime is 131611631. The reversal of 131611622 is 226116131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 226116131 = 19 ⋅11900849.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32902904 + ... + 32902907.

It is an arithmetic number, because the mean of its divisors is an integer number (49354359).

Almost surely, 2^131611622 is an apocalyptic number.

131611622 is a deficient number, since it is larger than the sum of its proper divisors (65805814).

131611622 is an equidigital number, since it uses as much as digits as its factorization.

131611622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65805813.

The product of its digits is 432, while the sum is 23.

The square root of 131611622 is about 11472.2108592895. The cubic root of 131611622 is about 508.6644822019.

Adding to 131611622 its reverse (226116131), we get a palindrome (357727753).

The spelling of 131611622 in words is "one hundred thirty-one million, six hundred eleven thousand, six hundred twenty-two".