155478943 has 4 divisors (see below), whose sum is σ = 155659968. Its totient is φ = 155297920.

The previous prime is 155478931. The next prime is 155478979. The reversal of 155478943 is 349874551.

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 155478943 - 2⁹ = 155478431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155478893 and 155478902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155478913) 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, 89218 + ... + 90943.

It is an arithmetic number, because the mean of its divisors is an integer number (38914992).

Almost surely, 2^155478943 is an apocalyptic number.

155478943 is a deficient number, since it is larger than the sum of its proper divisors (181025).

155478943 is an equidigital number, since it uses as much as digits as its factorization.

155478943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181024.

The product of its digits is 604800, while the sum is 46.

The square root of 155478943 is about 12469.1195759765. The cubic root of 155478943 is about 537.7212421104.

The spelling of 155478943 in words is "one hundred fifty-five million, four hundred seventy-eight thousand, nine hundred forty-three".