1525048821 has 6 divisors (see below), whose sum is σ = 2202848310. Its totient is φ = 1016699208.

The previous prime is 1525048817. The next prime is 1525048849. The reversal of 1525048821 is 1288405251.

1525048821 is a `hidden beast` number, since 1 + 52 + 504 + 88 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1320959025 + 204089796 = 36345^2 + 14286^2 .

It is not a de Polignac number, because 1525048821 - 2² = 1525048817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525040821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84724926 + ... + 84724943.

It is an arithmetic number, because the mean of its divisors is an integer number (367141385).

Almost surely, 2^1525048821 is an apocalyptic number.

It is an amenable number.

1525048821 is a deficient number, since it is larger than the sum of its proper divisors (677799489).

1525048821 is a wasteful number, since it uses less digits than its factorization.

1525048821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169449875 (or 169449872 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 1525048821 is about 39051.8734633820. The cubic root of 1525048821 is about 1151.0510418807.

The spelling of 1525048821 in words is "one billion, five hundred twenty-five million, forty-eight thousand, eight hundred twenty-one".