155561423 has 8 divisors (see below), whose sum is σ = 161076000. Its totient is φ = 150056928.

The previous prime is 155561381. The next prime is 155561447. The reversal of 155561423 is 324165551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155561423 - 2¹⁶ = 155495887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155561423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155561453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43190 + ... + 46652.

It is an arithmetic number, because the mean of its divisors is an integer number (20134500).

Almost surely, 2^155561423 is an apocalyptic number.

155561423 is a deficient number, since it is larger than the sum of its proper divisors (5514577).

155561423 is a wasteful number, since it uses less digits than its factorization.

155561423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041.

The product of its digits is 18000, while the sum is 32.

The square root of 155561423 is about 12472.4265081018. The cubic root of 155561423 is about 537.8163105205.

The spelling of 155561423 in words is "one hundred fifty-five million, five hundred sixty-one thousand, four hundred twenty-three".