131004436 has 12 divisors (see below), whose sum is σ = 232160320. Its totient is φ = 64672920.

The previous prime is 131004427. The next prime is 131004439. The reversal of 131004436 is 634400131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131004439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206970 + ... + 207601.

Almost surely, 2^131004436 is an apocalyptic number.

It is an amenable number.

131004436 is a deficient number, since it is larger than the sum of its proper divisors (101155884).

131004436 is a wasteful number, since it uses less digits than its factorization.

131004436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414654 (or 414652 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 131004436 is about 11445.7169281789. The cubic root of 131004436 is about 507.8810404073.

Adding to 131004436 its reverse (634400131), we get a palindrome (765404567).

The spelling of 131004436 in words is "one hundred thirty-one million, four thousand, four hundred thirty-six".