155909043 has 30 divisors (see below), whose sum is σ = 236516764. Its totient is φ = 102771504.

The previous prime is 155909027. The next prime is 155909051. The reversal of 155909043 is 340909551.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 155909043 - 2⁴ = 155909027 is a prime.

It is a super-4 number, since 4×155909043⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155908989 and 155909007.

It is not an unprimeable number, because it can be changed into a prime (155909053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1751743 + ... + 1751831.

Almost surely, 2^155909043 is an apocalyptic number.

155909043 is a deficient number, since it is larger than the sum of its proper divisors (80607721).

155909043 is an frugal number, since it uses more digits than its factorization.

155909043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 155909043 is about 12486.3542717640. The cubic root of 155909043 is about 538.2166167507.

Multiplying 155909043 by its product of nonzero digits (24300), we get a square (3788589744900 = 1946430²).

The spelling of 155909043 in words is "one hundred fifty-five million, nine hundred nine thousand, forty-three".