155603263 has 2 divisors, whose sum is σ = 155603264. Its totient is φ = 155603262.

The previous prime is 155603251. The next prime is 155603269. The reversal of 155603263 is 362306551.

155603263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155603263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155603269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77801631 + 77801632.

It is an arithmetic number, because the mean of its divisors is an integer number (77801632).

Almost surely, 2^155603263 is an apocalyptic number.

155603263 is a deficient number, since it is larger than the sum of its proper divisors (1).

155603263 is an equidigital number, since it uses as much as digits as its factorization.

155603263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 155603263 is about 12474.1036952560. The cubic root of 155603263 is about 537.8645234534.

The spelling of 155603263 in words is "one hundred fifty-five million, six hundred three thousand, two hundred sixty-three".