155506423 has 4 divisors (see below), whose sum is σ = 157109680. Its totient is φ = 153903168.

The previous prime is 155506391. The next prime is 155506433. The reversal of 155506423 is 324605551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155506423 - 2⁵ = 155506391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155506433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801483 + ... + 801676.

It is an arithmetic number, because the mean of its divisors is an integer number (39277420).

Almost surely, 2^155506423 is an apocalyptic number.

155506423 is a deficient number, since it is larger than the sum of its proper divisors (1603257).

155506423 is an equidigital number, since it uses as much as digits as its factorization.

155506423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603256.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 155506423 is about 12470.2214495172. The cubic root of 155506423 is about 537.7529199462.

The spelling of 155506423 in words is "one hundred fifty-five million, five hundred six thousand, four hundred twenty-three".