261525167 has 2 divisors, whose sum is σ = 261525168. Its totient is φ = 261525166.

The previous prime is 261525151. The next prime is 261525169. The reversal of 261525167 is 761525162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261525167 - 2⁴ = 261525151 is a prime.

Together with 261525169, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261525169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130762583 + 130762584.

It is an arithmetic number, because the mean of its divisors is an integer number (130762584).

Almost surely, 2^261525167 is an apocalyptic number.

261525167 is a deficient number, since it is larger than the sum of its proper divisors (1).

261525167 is an equidigital number, since it uses as much as digits as its factorization.

261525167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 261525167 is about 16171.7397641689. The cubic root of 261525167 is about 639.4959956126.

The spelling of 261525167 in words is "two hundred sixty-one million, five hundred twenty-five thousand, one hundred sixty-seven".