131501236 has 6 divisors (see below), whose sum is σ = 230127170. Its totient is φ = 65750616.

The previous prime is 131501221. The next prime is 131501297. The reversal of 131501236 is 632105131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 114361636 + 17139600 = 10694^2 + 4140^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16437651 + ... + 16437658.

Almost surely, 2^131501236 is an apocalyptic number.

It is an amenable number.

131501236 is a deficient number, since it is larger than the sum of its proper divisors (98625934).

131501236 is a wasteful number, since it uses less digits than its factorization.

131501236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32875313 (or 32875311 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131501236 is about 11467.3988332141. The cubic root of 131501236 is about 508.5222324978.

Adding to 131501236 its reverse (632105131), we get a palindrome (763606367).

The spelling of 131501236 in words is "one hundred thirty-one million, five hundred one thousand, two hundred thirty-six".