155405423 has 2 divisors, whose sum is σ = 155405424. Its totient is φ = 155405422.

The previous prime is 155405417. The next prime is 155405447. The reversal of 155405423 is 324504551.

155405423 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 155405423 - 2⁴ = 155405407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155405413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77702711 + 77702712.

It is an arithmetic number, because the mean of its divisors is an integer number (77702712).

Almost surely, 2^155405423 is an apocalyptic number.

155405423 is a deficient number, since it is larger than the sum of its proper divisors (1).

155405423 is an equidigital number, since it uses as much as digits as its factorization.

155405423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 155405423 is about 12466.1711443410. The cubic root of 155405423 is about 537.6364728638.

Adding to 155405423 its reverse (324504551), we get a palindrome (479909974).

The spelling of 155405423 in words is "one hundred fifty-five million, four hundred five thousand, four hundred twenty-three".