275242157 has 2 divisors, whose sum is σ = 275242158. Its totient is φ = 275242156.

The previous prime is 275242141. The next prime is 275242169. The reversal of 275242157 is 751242572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254274916 + 20967241 = 15946^2 + 4579^2 .

It is a cyclic number.

It is not a de Polignac number, because 275242157 - 2⁴ = 275242141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275242757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137621078 + 137621079.

It is an arithmetic number, because the mean of its divisors is an integer number (137621079).

Almost surely, 2^275242157 is an apocalyptic number.

It is an amenable number.

275242157 is a deficient number, since it is larger than the sum of its proper divisors (1).

275242157 is an equidigital number, since it uses as much as digits as its factorization.

275242157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39200, while the sum is 35.

The square root of 275242157 is about 16590.4236534213. The cubic root of 275242157 is about 650.4865445916.

The spelling of 275242157 in words is "two hundred seventy-five million, two hundred forty-two thousand, one hundred fifty-seven".