155385427 has 2 divisors, whose sum is σ = 155385428. Its totient is φ = 155385426.

The previous prime is 155385383. The next prime is 155385463. The reversal of 155385427 is 724583551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155385427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155385427.

It is not a weakly prime, because it can be changed into another prime (155385467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77692713 + 77692714.

It is an arithmetic number, because the mean of its divisors is an integer number (77692714).

Almost surely, 2^155385427 is an apocalyptic number.

155385427 is a deficient number, since it is larger than the sum of its proper divisors (1).

155385427 is an equidigital number, since it uses as much as digits as its factorization.

155385427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168000, while the sum is 40.

The square root of 155385427 is about 12465.3691080529. The cubic root of 155385427 is about 537.6134126646.

The spelling of 155385427 in words is "one hundred fifty-five million, three hundred eighty-five thousand, four hundred twenty-seven".