155264261 has 2 divisors, whose sum is σ = 155264262. Its totient is φ = 155264260.

The previous prime is 155264209. The next prime is 155264279. The reversal of 155264261 is 162462551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107516161 + 47748100 = 10369^2 + 6910^2 .

It is a cyclic number.

It is not a de Polignac number, because 155264261 - 2¹⁰ = 155263237 is a prime.

It is a super-2 number, since 2×155264261² = 48213981487752242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155264201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77632130 + 77632131.

It is an arithmetic number, because the mean of its divisors is an integer number (77632131).

Almost surely, 2^155264261 is an apocalyptic number.

It is an amenable number.

155264261 is a deficient number, since it is larger than the sum of its proper divisors (1).

155264261 is an equidigital number, since it uses as much as digits as its factorization.

155264261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 155264261 is about 12460.5080554526. The cubic root of 155264261 is about 537.4736367816.

The spelling of 155264261 in words is "one hundred fifty-five million, two hundred sixty-four thousand, two hundred sixty-one".