2021525404 has 12 divisors (see below), whose sum is σ = 3540698728. Its totient is φ = 1009897200.

The previous prime is 2021525399. The next prime is 2021525461. The reversal of 2021525404 is 4045251202.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 211107 + ... + 220474.

Almost surely, 2^2021525404 is an apocalyptic number.

It is an amenable number.

2021525404 is a deficient number, since it is larger than the sum of its proper divisors (1519173324).

2021525404 is a wasteful number, since it uses less digits than its factorization.

2021525404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432756 (or 432754 counting only the distinct ones).

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

The square root of 2021525404 is about 44961.3768027626. The cubic root of 2021525404 is about 1264.4249817763.

Adding to 2021525404 its reverse (4045251202), we get a palindrome (6066776606).

The spelling of 2021525404 in words is "two billion, twenty-one million, five hundred twenty-five thousand, four hundred four".