155332481 has 2 divisors, whose sum is σ = 155332482. Its totient is φ = 155332480.

The previous prime is 155332447. The next prime is 155332511. The reversal of 155332481 is 184233551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153536881 + 1795600 = 12391^2 + 1340^2 .

It is an emirp because it is prime and its reverse (184233551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155332481 is a prime.

It is a super-2 number, since 2×155332481² = 48256359307230722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_8727215 and since 155332481 and 8727215 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (155332421) 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, 77666240 + 77666241.

It is an arithmetic number, because the mean of its divisors is an integer number (77666241).

Almost surely, 2^155332481 is an apocalyptic number.

It is an amenable number.

155332481 is a deficient number, since it is larger than the sum of its proper divisors (1).

155332481 is an equidigital number, since it uses as much as digits as its factorization.

155332481 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 155332481 is about 12463.2452033971. The cubic root of 155332481 is about 537.5523436315.

The spelling of 155332481 in words is "one hundred fifty-five million, three hundred thirty-two thousand, four hundred eighty-one".