131537645 has 8 divisors (see below), whose sum is σ = 161516256. Its totient is φ = 102782736.

The previous prime is 131537641. The next prime is 131537657. The reversal of 131537645 is 546735131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131537645 - 2² = 131537641 is a prime.

It is a super-3 number, since 3×131537645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131537641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305687 + ... + 306116.

It is an arithmetic number, because the mean of its divisors is an integer number (20189532).

Almost surely, 2^131537645 is an apocalyptic number.

It is an amenable number.

131537645 is a deficient number, since it is larger than the sum of its proper divisors (29978611).

131537645 is an equidigital number, since it uses as much as digits as its factorization.

131537645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611851.

The product of its digits is 37800, while the sum is 35.

The square root of 131537645 is about 11468.9862237253. The cubic root of 131537645 is about 508.5691600098.

The spelling of 131537645 in words is "one hundred thirty-one million, five hundred thirty-seven thousand, six hundred forty-five".