155104981 has 2 divisors, whose sum is σ = 155104982. Its totient is φ = 155104980.

The previous prime is 155104969. The next prime is 155105051. The reversal of 155104981 is 189401551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141848100 + 13256881 = 11910^2 + 3641^2 .

It is a cyclic number.

It is not a de Polignac number, because 155104981 - 2¹³ = 155096789 is a prime.

It is a super-2 number, since 2×155104981² = 48115110262020722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155104921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77552490 + 77552491.

It is an arithmetic number, because the mean of its divisors is an integer number (77552491).

Almost surely, 2^155104981 is an apocalyptic number.

It is an amenable number.

155104981 is a deficient number, since it is larger than the sum of its proper divisors (1).

155104981 is an equidigital number, since it uses as much as digits as its factorization.

155104981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 155104981 is about 12454.1150227545. The cubic root of 155104981 is about 537.2897822973.

The spelling of 155104981 in words is "one hundred fifty-five million, one hundred four thousand, nine hundred eighty-one".