45131 has 2 divisors, whose sum is σ = 45132. Its totient is φ = 45130.
The previous prime is 45127. The next prime is 45137. The reversal of 45131 is 13154.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 45131 - 22 = 45127 is a prime.
It is a super-2 number, since 2×451312 = 4073614322, which contains 22 as substring.
It is a Sophie Germain prime.
It is not a weakly prime, because it can be changed into another prime (45137) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22565 + 22566.
It is an arithmetic number, because the mean of its divisors is an integer number (22566).
245131 is an apocalyptic number.
45131 is a deficient number, since it is larger than the sum of its proper divisors (1).
45131 is an equidigital number, since it uses as much as digits as its factorization.
45131 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 60, while the sum is 14.
The square root of 45131 is about 212.4405799277. The cubic root of 45131 is about 35.6034146453.
Adding to 45131 its reverse (13154), we get a palindrome (58285).
The spelling of 45131 in words is "forty-five thousand, one hundred thirty-one".
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