1022312220 has 96 divisors (see below), whose sum is σ = 2956455936. Its totient is φ = 263750400.

The previous prime is 1022312209. The next prime is 1022312267. The reversal of 1022312220 is 222132201.

It is a happy number.

It is a super-2 number, since 2×1022312220² = 2090244550322656800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1022312220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422815 + ... + 425225.

It is an arithmetic number, because the mean of its divisors is an integer number (30796416).

Almost surely, 2^1022312220 is an apocalyptic number.

1022312220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022312220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478227968).

1022312220 is an abundant number, since it is smaller than the sum of its proper divisors (1934143716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1022312220 is a wasteful number, since it uses less digits than its factorization.

1022312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1022312220 is about 31973.6175619838. The cubic root of 1022312220 is about 1007.3827672807.

Adding to 1022312220 its reverse (222132201), we get a palindrome (1244444421).

The spelling of 1022312220 in words is "one billion, twenty-two million, three hundred twelve thousand, two hundred twenty".