26506531 has 2 divisors, whose sum is σ = 26506532. Its totient is φ = 26506530.

The previous prime is 26506489. The next prime is 26506537. The reversal of 26506531 is 13560562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26506531 - 2¹¹ = 26504483 is a prime.

It is a super-2 number, since 2×26506531² = 1405192371307922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26506531.

It is not a weakly prime, because it can be changed into another prime (26506537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13253265 + 13253266.

It is an arithmetic number, because the mean of its divisors is an integer number (13253266).

Almost surely, 2^26506531 is an apocalyptic number.

26506531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26506531 is an equidigital number, since it uses as much as digits as its factorization.

26506531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 26506531 is about 5148.4493782109. The cubic root of 26506531 is about 298.1610880782.

The spelling of 26506531 in words is "twenty-six million, five hundred six thousand, five hundred thirty-one".