1023220500 has 48 divisors (see below), whose sum is σ = 2979622464. Its totient is φ = 272858400.

The previous prime is 1023220493. The next prime is 1023220501. The reversal of 1023220500 is 50223201.

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 1023220500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023220501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339574 + ... + 342573.

It is an arithmetic number, because the mean of its divisors is an integer number (62075468).

Almost surely, 2^1023220500 is an apocalyptic number.

1023220500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023220500 is an abundant number, since it is smaller than the sum of its proper divisors (1956401964).

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

1023220500 is a wasteful number, since it uses less digits than its factorization.

1023220500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682169 (or 682157 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1023220500 is about 31987.8179937301. The cubic root of 1023220500 is about 1007.6810175806.

Adding to 1023220500 its reverse (50223201), we get a palindrome (1073443701).

The spelling of 1023220500 in words is "one billion, twenty-three million, two hundred twenty thousand, five hundred".