155032403 has 2 divisors, whose sum is σ = 155032404. Its totient is φ = 155032402.

The previous prime is 155032391. The next prime is 155032417. The reversal of 155032403 is 304230551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155032403 is a prime.

It is not a weakly prime, because it can be changed into another prime (155032433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77516201 + 77516202.

It is an arithmetic number, because the mean of its divisors is an integer number (77516202).

Almost surely, 2^155032403 is an apocalyptic number.

155032403 is a deficient number, since it is larger than the sum of its proper divisors (1).

155032403 is an equidigital number, since it uses as much as digits as its factorization.

155032403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 155032403 is about 12451.2008657800. The cubic root of 155032403 is about 537.2059648693.

Adding to 155032403 its reverse (304230551), we get a palindrome (459262954).

The spelling of 155032403 in words is "one hundred fifty-five million, thirty-two thousand, four hundred three".