3155421838 has 4 divisors (see below), whose sum is σ = 4733132760. Its totient is φ = 1577710918.

The previous prime is 3155421817. The next prime is 3155421887. The reversal of 3155421838 is 8381245513.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3155421838.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 788855458 + ... + 788855461.

It is an arithmetic number, because the mean of its divisors is an integer number (1183283190).

Almost surely, 2^3155421838 is an apocalyptic number.

3155421838 is a deficient number, since it is larger than the sum of its proper divisors (1577710922).

3155421838 is a wasteful number, since it uses less digits than its factorization.

3155421838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577710921.

The product of its digits is 115200, while the sum is 40.

The square root of 3155421838 is about 56173.1416069993. The cubic root of 3155421838 is about 1466.7377698885.

The spelling of 3155421838 in words is "three billion, one hundred fifty-five million, four hundred twenty-one thousand, eight hundred thirty-eight".