820222407 has 6 divisors (see below), whose sum is σ = 1184765712. Its totient is φ = 546814932.

The previous prime is 820222393. The next prime is 820222423. The reversal of 820222407 is 704222028.

It is not a de Polignac number, because 820222407 - 2⁷ = 820222279 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820222607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45567903 + ... + 45567920.

It is an arithmetic number, because the mean of its divisors is an integer number (197460952).

Almost surely, 2^820222407 is an apocalyptic number.

820222407 is a deficient number, since it is larger than the sum of its proper divisors (364543305).

820222407 is a wasteful number, since it uses less digits than its factorization.

820222407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91135829 (or 91135826 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 820222407 is about 28639.5252579368. The cubic root of 820222407 is about 936.0747769264.

The spelling of 820222407 in words is "eight hundred twenty million, two hundred twenty-two thousand, four hundred seven".