155235403 has 2 divisors, whose sum is σ = 155235404. Its totient is φ = 155235402.

The previous prime is 155235401. The next prime is 155235413. The reversal of 155235403 is 304532551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155235403 - 2¹ = 155235401 is a prime.

Together with 155235401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (155235401) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77617701 + 77617702.

It is an arithmetic number, because the mean of its divisors is an integer number (77617702).

Almost surely, 2^155235403 is an apocalyptic number.

155235403 is a deficient number, since it is larger than the sum of its proper divisors (1).

155235403 is an equidigital number, since it uses as much as digits as its factorization.

155235403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 155235403 is about 12459.3500231754. The cubic root of 155235403 is about 537.4403357606.

Adding to 155235403 its reverse (304532551), we get a palindrome (459767954).

The spelling of 155235403 in words is "one hundred fifty-five million, two hundred thirty-five thousand, four hundred three".