2001223504 has 30 divisors (see below), whose sum is σ = 4510412394. Its totient is φ = 857666880.

The previous prime is 2001223453. The next prime is 2001223529. The reversal of 2001223504 is 4053221002.

It can be written as a sum of positive squares in only one way, i.e., 1627961104 + 373262400 = 40348^2 + 19320^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1275507 + ... + 1277074.

Almost surely, 2^2001223504 is an apocalyptic number.

It is an amenable number.

2001223504 is an abundant number, since it is smaller than the sum of its proper divisors (2509188890).

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

2001223504 is a wasteful number, since it uses less digits than its factorization.

2001223504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552603 (or 2552590 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2001223504 is about 44735.0366491411. The cubic root of 2001223504 is about 1260.1779172630.

Adding to 2001223504 its reverse (4053221002), we get a palindrome (6054444506).

The spelling of 2001223504 in words is "two billion, one million, two hundred twenty-three thousand, five hundred four".