155403323 has 2 divisors, whose sum is σ = 155403324. Its totient is φ = 155403322.

The previous prime is 155403289. The next prime is 155403331. The reversal of 155403323 is 323304551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155403323 - 2⁸ = 155403067 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 155403292 and 155403301.

It is not a weakly prime, because it can be changed into another prime (155403343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77701661 + 77701662.

It is an arithmetic number, because the mean of its divisors is an integer number (77701662).

Almost surely, 2^155403323 is an apocalyptic number.

155403323 is a deficient number, since it is larger than the sum of its proper divisors (1).

155403323 is an equidigital number, since it uses as much as digits as its factorization.

155403323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 155403323 is about 12466.0869161096. The cubic root of 155403323 is about 537.6340511515.

Adding to 155403323 its reverse (323304551), we get a palindrome (478707874).

The spelling of 155403323 in words is "one hundred fifty-five million, four hundred three thousand, three hundred twenty-three".