155385481 has 2 divisors, whose sum is σ = 155385482. Its totient is φ = 155385480.

The previous prime is 155385467. The next prime is 155385487. The reversal of 155385481 is 184583551.

It is a happy number.

155385481 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., 127125625 + 28259856 = 11275^2 + 5316^2 .

It is an emirp because it is prime and its reverse (184583551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155385481 - 2⁷ = 155385353 is a prime.

It is a super-2 number, since 2×155385481² = 48289295411202722, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (155385487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77692740 + 77692741.

It is an arithmetic number, because the mean of its divisors is an integer number (77692741).

Almost surely, 2^155385481 is an apocalyptic number.

It is an amenable number.

155385481 is a deficient number, since it is larger than the sum of its proper divisors (1).

155385481 is an equidigital number, since it uses as much as digits as its factorization.

155385481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96000, while the sum is 40.

The square root of 155385481 is about 12465.3712740536. The cubic root of 155385481 is about 537.6134749422.

The spelling of 155385481 in words is "one hundred fifty-five million, three hundred eighty-five thousand, four hundred eighty-one".