4051642221 has 16 divisors (see below), whose sum is σ = 6548109120. Its totient is φ = 2455540560.

The previous prime is 4051642151. The next prime is 4051642237. The reversal of 4051642221 is 1222461504.

It is not a de Polignac number, because 4051642221 - 2¹³ = 4051634029 is a prime.

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 (4051642321) 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, 6820650 + ... + 6821243.

It is an arithmetic number, because the mean of its divisors is an integer number (409256820).

Almost surely, 2^4051642221 is an apocalyptic number.

It is an amenable number.

4051642221 is a deficient number, since it is larger than the sum of its proper divisors (2496466899).

4051642221 is a wasteful number, since it uses less digits than its factorization.

4051642221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13641913 (or 13641907 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 4051642221 is about 63652.5115058314. The cubic root of 4051642221 is about 1594.2032716007.

The spelling of 4051642221 in words is "four billion, fifty-one million, six hundred forty-two thousand, two hundred twenty-one".