26497531 has 2 divisors, whose sum is σ = 26497532. Its totient is φ = 26497530.

The previous prime is 26497487. The next prime is 26497553. The reversal of 26497531 is 13579462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26497531 is a prime.

It is a super-2 number, since 2×26497531² = 1404238298191922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26497231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13248765 + 13248766.

It is an arithmetic number, because the mean of its divisors is an integer number (13248766).

Almost surely, 2^26497531 is an apocalyptic number.

26497531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26497531 is an equidigital number, since it uses as much as digits as its factorization.

26497531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 26497531 is about 5147.5752544280. The cubic root of 26497531 is about 298.1273384894.

It can be divided in two parts, 26497 and 531, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 26497531 in words is "twenty-six million, four hundred ninety-seven thousand, five hundred thirty-one".