3155421231 has 8 divisors (see below), whose sum is σ = 4674698160. Its totient is φ = 2103614136.

The previous prime is 3155421229. The next prime is 3155421259. The reversal of 3155421231 is 1321245513.

3155421231 is a `hidden beast` number, since 3 + 1 + 5 + 5 + 421 + 231 = 666.

It is not a de Polignac number, because 3155421231 - 2¹ = 3155421229 is a prime.

It is a super-2 number, since 2×3155421231² = 19913366290091110722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 116867453 = 3155421231 / (3 + 1 + 5 + 5 + 4 + 2 + 1 + 2 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 3155421195 and 3155421204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3155431231) 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 7 ways as a sum of consecutive naturals, for example, 58433700 + ... + 58433753.

It is an arithmetic number, because the mean of its divisors is an integer number (584337270).

Almost surely, 2^3155421231 is an apocalyptic number.

3155421231 is a deficient number, since it is larger than the sum of its proper divisors (1519276929).

3155421231 is a wasteful number, since it uses less digits than its factorization.

3155421231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116867462 (or 116867456 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 3155421231 is about 56173.1362040611. The cubic root of 3155421231 is about 1466.7376758377.

Adding to 3155421231 its reverse (1321245513), we get a palindrome (4476666744).

The spelling of 3155421231 in words is "three billion, one hundred fifty-five million, four hundred twenty-one thousand, two hundred thirty-one".