155004427 has 2 divisors, whose sum is σ = 155004428. Its totient is φ = 155004426.

The previous prime is 155004407. The next prime is 155004439. The reversal of 155004427 is 724400551.

155004427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155004427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155004395 and 155004404.

It is not a weakly prime, because it can be changed into another prime (155004407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77502213 + 77502214.

It is an arithmetic number, because the mean of its divisors is an integer number (77502214).

Almost surely, 2^155004427 is an apocalyptic number.

155004427 is a deficient number, since it is larger than the sum of its proper divisors (1).

155004427 is an equidigital number, since it uses as much as digits as its factorization.

155004427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 155004427 is about 12450.0773893177. The cubic root of 155004427 is about 537.1736495213.

Adding to 155004427 its reverse (724400551), we get a palindrome (879404978).

The spelling of 155004427 in words is "one hundred fifty-five million, four thousand, four hundred twenty-seven".