3155422221 has 48 divisors (see below), whose sum is σ = 5335908864. Its totient is φ = 1759387392.

The previous prime is 3155422219. The next prime is 3155422229. The reversal of 3155422221 is 1222245513.

3155422221 is a `hidden beast` number, since 3 + 15 + 5 + 422 + 221 = 666.

3155422221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3155422221 - 2¹ = 3155422219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3155422229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1103025 + ... + 1105881.

It is an arithmetic number, because the mean of its divisors is an integer number (111164768).

Almost surely, 2^3155422221 is an apocalyptic number.

It is an amenable number.

3155422221 is a deficient number, since it is larger than the sum of its proper divisors (2180486643).

3155422221 is a wasteful number, since it uses less digits than its factorization.

3155422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290 (or 3287 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 3155422221 is about 56173.1450161018. The cubic root of 3155422221 is about 1466.7378292319.

Adding to 3155422221 its reverse (1222245513), we get a palindrome (4377667734).

The spelling of 3155422221 in words is "three billion, one hundred fifty-five million, four hundred twenty-two thousand, two hundred twenty-one".