155540423 has 16 divisors (see below), whose sum is σ = 165322752. Its totient is φ = 146124000.

The previous prime is 155540387. The next prime is 155540447. The reversal of 155540423 is 324045551.

It is a cyclic number.

It is not a de Polignac number, because 155540423 - 2⁸ = 155540167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155540323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156458 + ... + 157448.

It is an arithmetic number, because the mean of its divisors is an integer number (10332672).

Almost surely, 2^155540423 is an apocalyptic number.

155540423 is a deficient number, since it is larger than the sum of its proper divisors (9782329).

155540423 is an equidigital number, since it uses as much as digits as its factorization.

155540423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 155540423 is about 12471.5846226532. The cubic root of 155540423 is about 537.7921086103.

Adding to 155540423 its reverse (324045551), we get a palindrome (479585974).

The spelling of 155540423 in words is "one hundred fifty-five million, five hundred forty thousand, four hundred twenty-three".