131522434 has 4 divisors (see below), whose sum is σ = 197283654. Its totient is φ = 65761216.

The previous prime is 131522431. The next prime is 131522473. The reversal of 131522434 is 434225131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434225131 = 53 ⋅8192927.

It can be written as a sum of positive squares in only one way, i.e., 87366409 + 44156025 = 9347^2 + 6645^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131522399 and 131522408.

It is not an unprimeable number, because it can be changed into a prime (131522431) by changing a digit.

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, 32880607 + ... + 32880610.

Almost surely, 2^131522434 is an apocalyptic number.

131522434 is a deficient number, since it is larger than the sum of its proper divisors (65761220).

131522434 is an equidigital number, since it uses as much as digits as its factorization.

131522434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65761219.

The product of its digits is 2880, while the sum is 25.

The square root of 131522434 is about 11468.3230683479. The cubic root of 131522434 is about 508.5495556253.

Adding to 131522434 its reverse (434225131), we get a palindrome (565747565).

The spelling of 131522434 in words is "one hundred thirty-one million, five hundred twenty-two thousand, four hundred thirty-four".