155311263 has 28 divisors (see below), whose sum is σ = 245138040. Its totient is φ = 98082576.

The previous prime is 155311243. The next prime is 155311309. The reversal of 155311263 is 362113551.

155311263 is a `hidden beast` number, since 1 + 5 + 531 + 126 + 3 = 666.

It is not a de Polignac number, because 155311263 - 2⁸ = 155311007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155311243) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 8245 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (8754930).

Almost surely, 2^155311263 is an apocalyptic number.

155311263 is a deficient number, since it is larger than the sum of its proper divisors (89826777).

155311263 is an equidigital number, since it uses as much as digits as its factorization.

155311263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11250 (or 11235 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 155311263 is about 12462.3939514044. The cubic root of 155311263 is about 537.5278664478.

The spelling of 155311263 in words is "one hundred fifty-five million, three hundred eleven thousand, two hundred sixty-three".