20132251 has 2 divisors, whose sum is σ = 20132252. Its totient is φ = 20132250.

The previous prime is 20132243. The next prime is 20132297. The reversal of 20132251 is 15223102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20132251 - 2³ = 20132243 is a prime.

It is not a weakly prime, because it can be changed into another prime (20132201) 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, 10066125 + 10066126.

It is an arithmetic number, because the mean of its divisors is an integer number (10066126).

Almost surely, 2^20132251 is an apocalyptic number.

20132251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132251 is an equidigital number, since it uses as much as digits as its factorization.

20132251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20132251 is about 4486.8977033135. The cubic root of 20132251 is about 272.0387551108.

Adding to 20132251 its reverse (15223102), we get a palindrome (35355353).

The spelling of 20132251 in words is "twenty million, one hundred thirty-two thousand, two hundred fifty-one".