155403263 has 2 divisors, whose sum is σ = 155403264. Its totient is φ = 155403262.

The previous prime is 155403233. The next prime is 155403271. The reversal of 155403263 is 362304551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155403263 - 2⁸ = 155403007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155403233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77701631 + 77701632.

It is an arithmetic number, because the mean of its divisors is an integer number (77701632).

Almost surely, 2^155403263 is an apocalyptic number.

155403263 is a deficient number, since it is larger than the sum of its proper divisors (1).

155403263 is an equidigital number, since it uses as much as digits as its factorization.

155403263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 155403263 is about 12466.0845095804. The cubic root of 155403263 is about 537.6339819594.

The spelling of 155403263 in words is "one hundred fifty-five million, four hundred three thousand, two hundred sixty-three".