155511423 has 12 divisors (see below), whose sum is σ = 225594720. Its totient is φ = 103227936.

The previous prime is 155511403. The next prime is 155511439. The reversal of 155511423 is 324115551.

It is not a de Polignac number, because 155511423 - 2²¹ = 153414271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155511403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34983 + ... + 39176.

It is an arithmetic number, because the mean of its divisors is an integer number (18799560).

Almost surely, 2^155511423 is an apocalyptic number.

155511423 is a deficient number, since it is larger than the sum of its proper divisors (70083297).

155511423 is a wasteful number, since it uses less digits than its factorization.

155511423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74398 (or 74395 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 155511423 is about 12470.4219255004. The cubic root of 155511423 is about 537.7586833433.

Adding to 155511423 its reverse (324115551), we get a palindrome (479626974).

The spelling of 155511423 in words is "one hundred fifty-five million, five hundred eleven thousand, four hundred twenty-three".