2505221404 has 24 divisors (see below), whose sum is σ = 5011502720. Its totient is φ = 1073439216.

The previous prime is 2505221393. The next prime is 2505221449. The reversal of 2505221404 is 4041225052.

It is a super-2 number, since 2×2505221404² = 12552268566119462432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252367 + ... + 262105.

Almost surely, 2^2505221404 is an apocalyptic number.

It is an amenable number.

2505221404 is an abundant number, since it is smaller than the sum of its proper divisors (2506281316).

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

2505221404 is a wasteful number, since it uses less digits than its factorization.

2505221404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18937 (or 18935 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2505221404 is about 50052.1868053734. The cubic root of 2505221404 is about 1358.1530226523.

Adding to 2505221404 its reverse (4041225052), we get a palindrome (6546446456).

The spelling of 2505221404 in words is "two billion, five hundred five million, two hundred twenty-one thousand, four hundred four".