1223345000 has 40 divisors (see below), whose sum is σ = 2866309050. Its totient is φ = 489336000.

The previous prime is 1223344987. The next prime is 1223345009. The reversal of 1223345000 is 5433221.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 57668836 + 1165676164 = 7594^2 + 34142^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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

It is not an unprimeable number, because it can be changed into a prime (1223345009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 117335 + ... + 127334.

Almost surely, 2^1223345000 is an apocalyptic number.

1223345000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223345000 is an abundant number, since it is smaller than the sum of its proper divisors (1642964050).

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

1223345000 is an equidigital number, since it uses as much as digits as its factorization.

1223345000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244695 (or 244676 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1223345000 is about 34976.3491519627. The cubic root of 1223345000 is about 1069.5054050943.

Adding to 1223345000 its reverse (5433221), we get a palindrome (1228778221).

The spelling of 1223345000 in words is "one billion, two hundred twenty-three million, three hundred forty-five thousand".