155268881 has 2 divisors, whose sum is σ = 155268882. Its totient is φ = 155268880.

The previous prime is 155268857. The next prime is 155268887. The reversal of 155268881 is 188862551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125238481 + 30030400 = 11191^2 + 5480^2 .

It is a cyclic number.

It is not a de Polignac number, because 155268881 - 2²² = 151074577 is a prime.

It is a super-2 number, since 2×155268881² = 48216850813984322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155268887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77634440 + 77634441.

It is an arithmetic number, because the mean of its divisors is an integer number (77634441).

Almost surely, 2^155268881 is an apocalyptic number.

It is an amenable number.

155268881 is a deficient number, since it is larger than the sum of its proper divisors (1).

155268881 is an equidigital number, since it uses as much as digits as its factorization.

155268881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153600, while the sum is 44.

The square root of 155268881 is about 12460.6934397729. The cubic root of 155268881 is about 537.4789677005.

The spelling of 155268881 in words is "one hundred fifty-five million, two hundred sixty-eight thousand, eight hundred eighty-one".