155440043 has 16 divisors (see below), whose sum is σ = 175737600. Its totient is φ = 136262880.

The previous prime is 155440037. The next prime is 155440057. The reversal of 155440043 is 340044551.

It is a cyclic number.

It is not a de Polignac number, because 155440043 - 2⁸ = 155439787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155439994 and 155440021.

It is not an unprimeable number, because it can be changed into a prime (155440073) 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, 32138 + ... + 36656.

It is an arithmetic number, because the mean of its divisors is an integer number (10983600).

Almost surely, 2^155440043 is an apocalyptic number.

155440043 is a deficient number, since it is larger than the sum of its proper divisors (20297557).

155440043 is a wasteful number, since it uses less digits than its factorization.

155440043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 155440043 is about 12467.5596248825. The cubic root of 155440043 is about 537.6763933770.

Adding to 155440043 its reverse (340044551), we get a palindrome (495484594).

The spelling of 155440043 in words is "one hundred fifty-five million, four hundred forty thousand, forty-three".