2549904821 has 8 divisors (see below), whose sum is σ = 2679915840. Its totient is φ = 2421489312.

The previous prime is 2549904811. The next prime is 2549904829. The reversal of 2549904821 is 1284099452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2549904821 - 2¹⁴ = 2549888437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549904829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395600 + ... + 401993.

It is an arithmetic number, because the mean of its divisors is an integer number (334989480).

Almost surely, 2^2549904821 is an apocalyptic number.

It is an amenable number.

2549904821 is a deficient number, since it is larger than the sum of its proper divisors (130011019).

2549904821 is a wasteful number, since it uses less digits than its factorization.

2549904821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797755.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 2549904821 is about 50496.5822704864. The cubic root of 2549904821 is about 1366.1802100208.

The spelling of 2549904821 in words is "two billion, five hundred forty-nine million, nine hundred four thousand, eight hundred twenty-one".