155564119 has 2 divisors, whose sum is σ = 155564120. Its totient is φ = 155564118.

The previous prime is 155564117. The next prime is 155564137. The reversal of 155564119 is 911465551.

155564119 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155564119 - 2¹ = 155564117 is a prime.

It is a super-2 number, since 2×155564119² = 48400390240492322, which contains 22 as substring.

Together with 155564117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155564113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77782059 + 77782060.

It is an arithmetic number, because the mean of its divisors is an integer number (77782060).

Almost surely, 2^155564119 is an apocalyptic number.

155564119 is a deficient number, since it is larger than the sum of its proper divisors (1).

155564119 is an equidigital number, since it uses as much as digits as its factorization.

155564119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 37.

The square root of 155564119 is about 12472.5345860414. The cubic root of 155564119 is about 537.8194174270.

The spelling of 155564119 in words is "one hundred fifty-five million, five hundred sixty-four thousand, one hundred nineteen".