233221340 has 24 divisors (see below), whose sum is σ = 534289392. Its totient is φ = 84807680.

The previous prime is 233221327. The next prime is 233221343. The reversal of 233221340 is 43122332.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233221343) 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 7 ways as a sum of consecutive naturals, for example, 529829 + ... + 530268.

It is an arithmetic number, because the mean of its divisors is an integer number (22262058).

Almost surely, 2^233221340 is an apocalyptic number.

233221340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233221340 is an abundant number, since it is smaller than the sum of its proper divisors (301068052).

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

233221340 is a wasteful number, since it uses less digits than its factorization.

233221340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060117 (or 1060115 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 233221340 is about 15271.5860342009. The cubic root of 233221340 is about 615.5397381298.

Adding to 233221340 its reverse (43122332), we get a palindrome (276343672).

The spelling of 233221340 in words is "two hundred thirty-three million, two hundred twenty-one thousand, three hundred forty".