131226795428 has 6 divisors (see below), whose sum is σ = 229646892006. Its totient is φ = 65613397712.

The previous prime is 131226795421. The next prime is 131226795487. The reversal of 131226795428 is 824597622131.

It can be written as a sum of positive squares in only one way, i.e., 78830669824 + 52396125604 = 280768^2 + 228902^2 .

It is not an unprimeable number, because it can be changed into a prime (131226795421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16403349425 + ... + 16403349432.

It is an arithmetic number, because the mean of its divisors is an integer number (38274482001).

Almost surely, 2^131226795428 is an apocalyptic number.

It is an amenable number.

131226795428 is a deficient number, since it is larger than the sum of its proper divisors (98420096578).

131226795428 is a wasteful number, since it uses less digits than its factorization.

131226795428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32806698861 (or 32806698859 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The spelling of 131226795428 in words is "one hundred thirty-one billion, two hundred twenty-six million, seven hundred ninety-five thousand, four hundred twenty-eight".