155525081 has 2 divisors, whose sum is σ = 155525082. Its totient is φ = 155525080.

The previous prime is 155524991. The next prime is 155525087. The reversal of 155525081 is 180525551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136305625 + 19219456 = 11675^2 + 4384^2 .

It is a cyclic number.

It is not a de Polignac number, because 155525081 - 2¹⁴ = 155508697 is a prime.

It is a super-2 number, since 2×155525081² = 48376101640113122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155525087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77762540 + 77762541.

It is an arithmetic number, because the mean of its divisors is an integer number (77762541).

Almost surely, 2^155525081 is an apocalyptic number.

It is an amenable number.

155525081 is a deficient number, since it is larger than the sum of its proper divisors (1).

155525081 is an equidigital number, since it uses as much as digits as its factorization.

155525081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10000, while the sum is 32.

The square root of 155525081 is about 12470.9695292708. The cubic root of 155525081 is about 537.7744260091.

The spelling of 155525081 in words is "one hundred fifty-five million, five hundred twenty-five thousand, eighty-one".