52491157 has 2 divisors, whose sum is σ = 52491158. Its totient is φ = 52491156.

The previous prime is 52491149. The next prime is 52491191. The reversal of 52491157 is 75119425.

52491157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (52491191) can be obtained adding 52491157 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36857041 + 15634116 = 6071^2 + 3954^2 .

It is a cyclic number.

It is not a de Polignac number, because 52491157 - 2³ = 52491149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52497157) 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, 26245578 + 26245579.

It is an arithmetic number, because the mean of its divisors is an integer number (26245579).

Almost surely, 2^52491157 is an apocalyptic number.

It is an amenable number.

52491157 is a deficient number, since it is larger than the sum of its proper divisors (1).

52491157 is an equidigital number, since it uses as much as digits as its factorization.

52491157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 34.

The square root of 52491157 is about 7245.0781224221. The cubic root of 52491157 is about 374.4225946571.

The spelling of 52491157 in words is "fifty-two million, four hundred ninety-one thousand, one hundred fifty-seven".