131551436 has 12 divisors (see below), whose sum is σ = 232253112. Its totient is φ = 65193408.

The previous prime is 131551429. The next prime is 131551439. The reversal of 131551436 is 634155131.

It is a junction number, because it is equal to n+sod(n) for n = 131551399 and 131551408.

It is not an unprimeable number, because it can be changed into a prime (131551439) 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, 145070 + ... + 145973.

It is an arithmetic number, because the mean of its divisors is an integer number (19354426).

Almost surely, 2^131551436 is an apocalyptic number.

It is an amenable number.

131551436 is a deficient number, since it is larger than the sum of its proper divisors (100701676).

131551436 is a wasteful number, since it uses less digits than its factorization.

131551436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291160 (or 291158 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 131551436 is about 11469.5874380904. The cubic root of 131551436 is about 508.5869329502.

The spelling of 131551436 in words is "one hundred thirty-one million, five hundred fifty-one thousand, four hundred thirty-six".