155241019 has 2 divisors, whose sum is σ = 155241020. Its totient is φ = 155241018.

The previous prime is 155241017. The next prime is 155241067. The reversal of 155241019 is 910142551.

It is a weak prime.

It is an emirp because it is prime and its reverse (910142551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155241019 - 2¹ = 155241017 is a prime.

It is a super-2 number, since 2×155241019² = 48199547960316722, which contains 22 as substring.

Together with 155241017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (155241017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77620509 + 77620510.

It is an arithmetic number, because the mean of its divisors is an integer number (77620510).

Almost surely, 2^155241019 is an apocalyptic number.

155241019 is a deficient number, since it is larger than the sum of its proper divisors (1).

155241019 is an equidigital number, since it uses as much as digits as its factorization.

155241019 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 155241019 is about 12459.5753940493. The cubic root of 155241019 is about 537.4468167318.

The spelling of 155241019 in words is "one hundred fifty-five million, two hundred forty-one thousand, nineteen".