155541251 has 2 divisors, whose sum is σ = 155541252. Its totient is φ = 155541250.

The previous prime is 155541241. The next prime is 155541257. The reversal of 155541251 is 152145551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155541251 - 2⁶ = 155541187 is a prime.

It is not a weakly prime, because it can be changed into another prime (155541257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77770625 + 77770626.

It is an arithmetic number, because the mean of its divisors is an integer number (77770626).

Almost surely, 2^155541251 is an apocalyptic number.

155541251 is a deficient number, since it is larger than the sum of its proper divisors (1).

155541251 is an equidigital number, since it uses as much as digits as its factorization.

155541251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5000, while the sum is 29.

The square root of 155541251 is about 12471.6178180700. The cubic root of 155541251 is about 537.7930628983.

The spelling of 155541251 in words is "one hundred fifty-five million, five hundred forty-one thousand, two hundred fifty-one".