155404023 has 16 divisors (see below), whose sum is σ = 214502400. Its totient is φ = 99973440.

The previous prime is 155404001. The next prime is 155404061. The reversal of 155404023 is 320404551.

It is not a de Polignac number, because 155404023 - 2¹² = 155399927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155403984 and 155404002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155403023) 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, 33043 + ... + 37451.

It is an arithmetic number, because the mean of its divisors is an integer number (13406400).

Almost surely, 2^155404023 is an apocalyptic number.

155404023 is a deficient number, since it is larger than the sum of its proper divisors (59098377).

155404023 is a wasteful number, since it uses less digits than its factorization.

155404023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4822.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 155404023 is about 12466.1149922500. The cubic root of 155404023 is about 537.6348583913.

Adding to 155404023 its reverse (320404551), we get a palindrome (475808574).

The spelling of 155404023 in words is "one hundred fifty-five million, four hundred four thousand, twenty-three".