155515141 has 2 divisors, whose sum is σ = 155515142. Its totient is φ = 155515140.

The previous prime is 155515103. The next prime is 155515147. The reversal of 155515141 is 141515551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143640225 + 11874916 = 11985^2 + 3446^2 .

It is a cyclic number.

It is not a de Polignac number, because 155515141 - 2⁷ = 155515013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155515147) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77757570 + 77757571.

It is an arithmetic number, because the mean of its divisors is an integer number (77757571).

Almost surely, 2^155515141 is an apocalyptic number.

It is an amenable number.

155515141 is a deficient number, since it is larger than the sum of its proper divisors (1).

155515141 is an equidigital number, since it uses as much as digits as its factorization.

155515141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2500, while the sum is 28.

The square root of 155515141 is about 12470.5709973521. The cubic root of 155515141 is about 537.7629689252.

The spelling of 155515141 in words is "one hundred fifty-five million, five hundred fifteen thousand, one hundred forty-one".