4007906221 has 4 divisors (see below), whose sum is σ = 4372261344. Its totient is φ = 3643551100.

The previous prime is 4007906219. The next prime is 4007906249. The reversal of 4007906221 is 1226097004.

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 4007906221 - 2¹ = 4007906219 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4007906321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182177545 + ... + 182177566.

It is an arithmetic number, because the mean of its divisors is an integer number (1093065336).

Almost surely, 2^4007906221 is an apocalyptic number.

It is an amenable number.

4007906221 is a deficient number, since it is larger than the sum of its proper divisors (364355123).

4007906221 is a wasteful number, since it uses less digits than its factorization.

4007906221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364355122.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 4007906221 is about 63308.0265132313. The cubic root of 4007906221 is about 1588.4462256169.

The spelling of 4007906221 in words is "four billion, seven million, nine hundred six thousand, two hundred twenty-one".