4451221151 has 12 divisors (see below), whose sum is σ = 4897816392. Its totient is φ = 4021371888.

The previous prime is 4451221147. The next prime is 4451221157. The reversal of 4451221151 is 1511221544.

It is a happy number.

It is not a de Polignac number, because 4451221151 - 2² = 4451221147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4451221151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451221157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48785 + ... + 106218.

It is an arithmetic number, because the mean of its divisors is an integer number (408151366).

Almost surely, 2^4451221151 is an apocalyptic number.

4451221151 is a deficient number, since it is larger than the sum of its proper divisors (446595241).

4451221151 is a wasteful number, since it uses less digits than its factorization.

4451221151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155110 (or 155063 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

The square root of 4451221151 is about 66717.4726065069. The cubic root of 4451221151 is about 1644.9765983065.

Adding to 4451221151 its reverse (1511221544), we get a palindrome (5962442695).

The spelling of 4451221151 in words is "four billion, four hundred fifty-one million, two hundred twenty-one thousand, one hundred fifty-one".