5156440221 has 16 divisors (see below), whose sum is σ = 7281926784. Its totient is φ = 3234415104.

The previous prime is 5156440217. The next prime is 5156440243. The reversal of 5156440221 is 1220446515.

5156440221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5156440221 - 2² = 5156440217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5156440021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173560 + ... + 201086.

It is an arithmetic number, because the mean of its divisors is an integer number (455120424).

Almost surely, 2^5156440221 is an apocalyptic number.

5156440221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5156440221 is a deficient number, since it is larger than the sum of its proper divisors (2125486563).

5156440221 is a wasteful number, since it uses less digits than its factorization.

5156440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31220.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 5156440221 is about 71808.3575985414. The cubic root of 5156440221 is about 1727.6270518091.

Adding to 5156440221 its reverse (1220446515), we get a palindrome (6376886736).

The spelling of 5156440221 in words is "five billion, one hundred fifty-six million, four hundred forty thousand, two hundred twenty-one".