131615201227 has 4 divisors (see below), whose sum is σ = 132064400160. Its totient is φ = 131166002296.

The previous prime is 131615201197. The next prime is 131615201231. The reversal of 131615201227 is 722102516131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131615201227 - 2⁷ = 131615201099 is a prime.

It is a super-2 number, since 2×131615201227² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131615201027) 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, 224599027 + ... + 224599612.

It is an arithmetic number, because the mean of its divisors is an integer number (33016100040).

Almost surely, 2^131615201227 is an apocalyptic number.

131615201227 is a deficient number, since it is larger than the sum of its proper divisors (449198933).

131615201227 is an equidigital number, since it uses as much as digits as its factorization.

131615201227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449198932.

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 131615201227 its reverse (722102516131), we get a palindrome (853717717358).

The spelling of 131615201227 in words is "one hundred thirty-one billion, six hundred fifteen million, two hundred one thousand, two hundred twenty-seven".