155212459 has 2 divisors, whose sum is σ = 155212460. Its totient is φ = 155212458.

The previous prime is 155212439. The next prime is 155212469. The reversal of 155212459 is 954212551.

It is a strong prime.

It is an emirp because it is prime and its reverse (954212551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155212459 - 2⁷ = 155212331 is a prime.

It is not a weakly prime, because it can be changed into another prime (155212439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77606229 + 77606230.

It is an arithmetic number, because the mean of its divisors is an integer number (77606230).

Almost surely, 2^155212459 is an apocalyptic number.

155212459 is a deficient number, since it is larger than the sum of its proper divisors (1).

155212459 is an equidigital number, since it uses as much as digits as its factorization.

155212459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 34.

The square root of 155212459 is about 12458.4292348594. The cubic root of 155212459 is about 537.4138563227.

The spelling of 155212459 in words is "one hundred fifty-five million, two hundred twelve thousand, four hundred fifty-nine".