155313563 has 2 divisors, whose sum is σ = 155313564. Its totient is φ = 155313562.

The previous prime is 155313551. The next prime is 155313607. The reversal of 155313563 is 365313551.

155313563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155313563 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (155313523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77656781 + 77656782.

It is an arithmetic number, because the mean of its divisors is an integer number (77656782).

Almost surely, 2^155313563 is an apocalyptic number.

155313563 is a deficient number, since it is larger than the sum of its proper divisors (1).

155313563 is an equidigital number, since it uses as much as digits as its factorization.

155313563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250, while the sum is 32.

The square root of 155313563 is about 12462.4862286784. The cubic root of 155313563 is about 537.5305198462.

The spelling of 155313563 in words is "one hundred fifty-five million, three hundred thirteen thousand, five hundred sixty-three".