4345051221 has 16 divisors (see below), whose sum is σ = 7356700800. Its totient is φ = 2482886304.

The previous prime is 4345051181. The next prime is 4345051261. The reversal of 4345051221 is 1221505434.

4345051221 is a `hidden beast` number, since 4 + 34 + 505 + 122 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (4345051181) and next prime (4345051261).

It is not a de Polignac number, because 4345051221 - 2⁷ = 4345051093 is a prime.

It is a super-2 number, since 2×4345051221² = 37758940226227181682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4345051261) 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, 11494656 + ... + 11495033.

It is an arithmetic number, because the mean of its divisors is an integer number (459793800).

Almost surely, 2^4345051221 is an apocalyptic number.

It is an amenable number.

4345051221 is a deficient number, since it is larger than the sum of its proper divisors (3011649579).

4345051221 is a wasteful number, since it uses less digits than its factorization.

4345051221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22989705 (or 22989699 counting only the distinct ones).

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

The square root of 4345051221 is about 65917.0025183184. The cubic root of 4345051221 is about 1631.7926281440.

Adding to 4345051221 its reverse (1221505434), we get a palindrome (5566556655).

The spelling of 4345051221 in words is "four billion, three hundred forty-five million, fifty-one thousand, two hundred twenty-one".