155362261 has 2 divisors, whose sum is σ = 155362262. Its totient is φ = 155362260.

The previous prime is 155362241. The next prime is 155362279. The reversal of 155362261 is 162263551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130302225 + 25060036 = 11415^2 + 5006^2 .

It is a cyclic number.

It is not a de Polignac number, because 155362261 - 2⁹ = 155361749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155362211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77681130 + 77681131.

It is an arithmetic number, because the mean of its divisors is an integer number (77681131).

Almost surely, 2^155362261 is an apocalyptic number.

It is an amenable number.

155362261 is a deficient number, since it is larger than the sum of its proper divisors (1).

155362261 is an equidigital number, since it uses as much as digits as its factorization.

155362261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 155362261 is about 12464.4398590550. The cubic root of 155362261 is about 537.5866942188.

The spelling of 155362261 in words is "one hundred fifty-five million, three hundred sixty-two thousand, two hundred sixty-one".