1233213220 has 24 divisors (see below), whose sum is σ = 2593471608. Its totient is φ = 492576000.

The previous prime is 1233213209. The next prime is 1233213229. The reversal of 1233213220 is 223123321.

It can be written as a sum of positive squares in 4 ways, for example, as 38266596 + 1194946624 = 6186^2 + 34568^2 .

It is not an unprimeable number, because it can be changed into a prime (1233213229) 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, 29961 + ... + 58000.

It is an arithmetic number, because the mean of its divisors is an integer number (108061317).

Almost surely, 2^1233213220 is an apocalyptic number.

1233213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1233213220 is an abundant number, since it is smaller than the sum of its proper divisors (1360258388).

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

1233213220 is a wasteful number, since it uses less digits than its factorization.

1233213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88671 (or 88669 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1233213220 is about 35117.1357032432. The cubic root of 1233213220 is about 1072.3734601840.

Adding to 1233213220 its reverse (223123321), we get a palindrome (1456336541).

It can be divided in two parts, 12332 and 13220, that added together give a palindrome (25552).

The spelling of 1233213220 in words is "one billion, two hundred thirty-three million, two hundred thirteen thousand, two hundred twenty".