260005631 has 2 divisors, whose sum is σ = 260005632. Its totient is φ = 260005630.

The previous prime is 260005601. The next prime is 260005637. The reversal of 260005631 is 136500062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260005631 - 2²² = 255811327 is a prime.

It is a super-2 number, since 2×260005631² = 135205856303416322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 260005597 and 260005606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260005637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130002815 + 130002816.

It is an arithmetic number, because the mean of its divisors is an integer number (130002816).

Almost surely, 2^260005631 is an apocalyptic number.

260005631 is a deficient number, since it is larger than the sum of its proper divisors (1).

260005631 is an equidigital number, since it uses as much as digits as its factorization.

260005631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 260005631 is about 16124.6901055493. The cubic root of 260005631 is about 638.2550375299.

Adding to 260005631 its reverse (136500062), we get a palindrome (396505693).

The spelling of 260005631 in words is "two hundred sixty million, five thousand, six hundred thirty-one".