3155644421 has 4 divisors (see below), whose sum is σ = 3166795392. Its totient is φ = 3144493452.

The previous prime is 3155644409. The next prime is 3155644423. The reversal of 3155644421 is 1244465513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3155644421 - 2¹⁰ = 3155643397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3155644423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5575061 + ... + 5575626.

It is an arithmetic number, because the mean of its divisors is an integer number (791698848).

Almost surely, 2^3155644421 is an apocalyptic number.

It is an amenable number.

3155644421 is a deficient number, since it is larger than the sum of its proper divisors (11150971).

3155644421 is a wasteful number, since it uses less digits than its factorization.

3155644421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11150970.

The product of its digits is 57600, while the sum is 35.

The square root of 3155644421 is about 56175.1227947034. The cubic root of 3155644421 is about 1466.7722569010.

The spelling of 3155644421 in words is "three billion, one hundred fifty-five million, six hundred forty-four thousand, four hundred twenty-one".