261164153 has 2 divisors, whose sum is σ = 261164154. Its totient is φ = 261164152.

The previous prime is 261164129. The next prime is 261164159. The reversal of 261164153 is 351461162.

It is a happy number.

261164153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138109504 + 123054649 = 11752^2 + 11093^2 .

It is a cyclic number.

It is not a de Polignac number, because 261164153 - 2¹² = 261160057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (261164159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130582076 + 130582077.

It is an arithmetic number, because the mean of its divisors is an integer number (130582077).

Almost surely, 2^261164153 is an apocalyptic number.

It is an amenable number.

261164153 is a deficient number, since it is larger than the sum of its proper divisors (1).

261164153 is an equidigital number, since it uses as much as digits as its factorization.

261164153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 261164153 is about 16160.5740306463. The cubic root of 261164153 is about 639.2016028874.

The spelling of 261164153 in words is "two hundred sixty-one million, one hundred sixty-four thousand, one hundred fifty-three".