4222640421 has 48 divisors (see below), whose sum is σ = 6553198080. Its totient is φ = 2610777600.

The previous prime is 4222640419. The next prime is 4222640423. The reversal of 4222640421 is 1240462224.

4222640421 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4222640419) and next prime (4222640423).

It is not a de Polignac number, because 4222640421 - 2¹ = 4222640419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4222640423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4063620 + ... + 4064658.

It is an arithmetic number, because the mean of its divisors is an integer number (136524960).

Almost surely, 2^4222640421 is an apocalyptic number.

It is an amenable number.

4222640421 is a deficient number, since it is larger than the sum of its proper divisors (2330557659).

4222640421 is a wasteful number, since it uses less digits than its factorization.

4222640421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 4222640421 is about 64981.8468574109. The cubic root of 4222640421 is about 1616.3225557658.

The spelling of 4222640421 in words is "four billion, two hundred twenty-two million, six hundred forty thousand, four hundred twenty-one".