4220286921 has 8 divisors (see below), whose sum is σ = 6252276960. Its totient is φ = 2813524596.

The previous prime is 4220286881. The next prime is 4220286923. The reversal of 4220286921 is 1296820224.

It is not a de Polignac number, because 4220286921 - 2⁷ = 4220286793 is a prime.

It is a super-3 number, since 3×4220286921³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (4220286923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78153435 + ... + 78153488.

It is an arithmetic number, because the mean of its divisors is an integer number (781534620).

Almost surely, 2^4220286921 is an apocalyptic number.

It is an amenable number.

4220286921 is a deficient number, since it is larger than the sum of its proper divisors (2031990039).

4220286921 is a wasteful number, since it uses less digits than its factorization.

4220286921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156306932 (or 156306926 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 4220286921 is about 64963.7354298535. The cubic root of 4220286921 is about 1616.0222127181.

The spelling of 4220286921 in words is "four billion, two hundred twenty million, two hundred eighty-six thousand, nine hundred twenty-one".