155506433 has 2 divisors, whose sum is σ = 155506434. Its totient is φ = 155506432.

The previous prime is 155506391. The next prime is 155506441. The reversal of 155506433 is 334605551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121727089 + 33779344 = 11033^2 + 5812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155506433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155506433.

It is not a weakly prime, because it can be changed into another prime (155506333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77753216 + 77753217.

It is an arithmetic number, because the mean of its divisors is an integer number (77753217).

Almost surely, 2^155506433 is an apocalyptic number.

It is an amenable number.

155506433 is a deficient number, since it is larger than the sum of its proper divisors (1).

155506433 is an equidigital number, since it uses as much as digits as its factorization.

155506433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 155506433 is about 12470.2218504724. The cubic root of 155506433 is about 537.7529314731.

The spelling of 155506433 in words is "one hundred fifty-five million, five hundred six thousand, four hundred thirty-three".