26515157 has 2 divisors, whose sum is σ = 26515158. Its totient is φ = 26515156.

The previous prime is 26515141. The next prime is 26515171. The reversal of 26515157 is 75151562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16313521 + 10201636 = 4039^2 + 3194^2 .

It is a cyclic number.

It is not a de Polignac number, because 26515157 - 2⁴ = 26515141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26517157) 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, 13257578 + 13257579.

It is an arithmetic number, because the mean of its divisors is an integer number (13257579).

Almost surely, 2^26515157 is an apocalyptic number.

It is an amenable number.

26515157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26515157 is an equidigital number, since it uses as much as digits as its factorization.

26515157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10500, while the sum is 32.

The square root of 26515157 is about 5149.2870380277. The cubic root of 26515157 is about 298.1934280148.

The spelling of 26515157 in words is "twenty-six million, five hundred fifteen thousand, one hundred fifty-seven".