155241091 has 2 divisors, whose sum is σ = 155241092. Its totient is φ = 155241090.

The previous prime is 155241071. The next prime is 155241103. The reversal of 155241091 is 190142551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155241091 - 2¹⁵ = 155208323 is a prime.

It is not a weakly prime, because it can be changed into another prime (155241071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77620545 + 77620546.

It is an arithmetic number, because the mean of its divisors is an integer number (77620546).

Almost surely, 2^155241091 is an apocalyptic number.

155241091 is a deficient number, since it is larger than the sum of its proper divisors (1).

155241091 is an equidigital number, since it uses as much as digits as its factorization.

155241091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 155241091 is about 12459.5782833931. The cubic root of 155241091 is about 537.4468998202.

The spelling of 155241091 in words is "one hundred fifty-five million, two hundred forty-one thousand, ninety-one".