131956436 has 6 divisors (see below), whose sum is σ = 230923770. Its totient is φ = 65978216.

The previous prime is 131956427. The next prime is 131956457. The reversal of 131956436 is 634659131.

It can be written as a sum of positive squares in only one way, i.e., 117592336 + 14364100 = 10844^2 + 3790^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131956436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16494551 + ... + 16494558.

It is an arithmetic number, because the mean of its divisors is an integer number (38487295).

Almost surely, 2^131956436 is an apocalyptic number.

It is an amenable number.

131956436 is a deficient number, since it is larger than the sum of its proper divisors (98967334).

131956436 is a wasteful number, since it uses less digits than its factorization.

131956436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32989113 (or 32989111 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 131956436 is about 11487.2292568748. The cubic root of 131956436 is about 509.1083175827.

The spelling of 131956436 in words is "one hundred thirty-one million, nine hundred fifty-six thousand, four hundred thirty-six".