2521403204 has 6 divisors (see below), whose sum is σ = 4412455614. Its totient is φ = 1260701600.

The previous prime is 2521403179. The next prime is 2521403207. The reversal of 2521403204 is 4023041252.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2473072900 + 48330304 = 49730^2 + 6952^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2521403204.

It is not an unprimeable number, because it can be changed into a prime (2521403207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315175397 + ... + 315175404.

It is an arithmetic number, because the mean of its divisors is an integer number (735409269).

Almost surely, 2^2521403204 is an apocalyptic number.

It is an amenable number.

2521403204 is a deficient number, since it is larger than the sum of its proper divisors (1891052410).

2521403204 is a wasteful number, since it uses less digits than its factorization.

2521403204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630350805 (or 630350803 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2521403204 is about 50213.5758933777. The cubic root of 2521403204 is about 1361.0709564635.

Adding to 2521403204 its reverse (4023041252), we get a palindrome (6544444456).

The spelling of 2521403204 in words is "two billion, five hundred twenty-one million, four hundred three thousand, two hundred four".