4785156221 has 4 divisors (see below), whose sum is σ = 4785398592. Its totient is φ = 4784913852.

The previous prime is 4785156217. The next prime is 4785156227. The reversal of 4785156221 is 1226515874.

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 4785156221 - 2² = 4785156217 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 (4785156227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88661 + ... + 132026.

It is an arithmetic number, because the mean of its divisors is an integer number (1196349648).

Almost surely, 2^4785156221 is an apocalyptic number.

It is an amenable number.

4785156221 is a deficient number, since it is larger than the sum of its proper divisors (242371).

4785156221 is a wasteful number, since it uses less digits than its factorization.

4785156221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242370.

The product of its digits is 134400, while the sum is 41.

The square root of 4785156221 is about 69174.8236065695. The cubic root of 4785156221 is about 1685.1246839557.

The spelling of 4785156221 in words is "four billion, seven hundred eighty-five million, one hundred fifty-six thousand, two hundred twenty-one".