131553536 has 18 divisors (see below), whose sum is σ = 262593702. Its totient is φ = 65776640.

The previous prime is 131553533. The next prime is 131553547. The reversal of 131553536 is 635355131.

It can be written as a sum of positive squares in only one way, i.e., 131239936 + 313600 = 11456^2 + 560^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (131553533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256685 + ... + 257196.

It is an arithmetic number, because the mean of its divisors is an integer number (14588539).

Almost surely, 2^131553536 is an apocalyptic number.

131553536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131553536 is a deficient number, since it is larger than the sum of its proper divisors (131040166).

131553536 is an frugal number, since it uses more digits than its factorization.

131553536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513897 (or 513883 counting only the distinct ones).

The product of its digits is 20250, while the sum is 32.

The square root of 131553536 is about 11469.6789841739. The cubic root of 131553536 is about 508.5896391842.

The spelling of 131553536 in words is "one hundred thirty-one million, five hundred fifty-three thousand, five hundred thirty-six".