2485305821 has 4 divisors (see below), whose sum is σ = 2486558592. Its totient is φ = 2484053052.

The previous prime is 2485305817. The next prime is 2485305827. The reversal of 2485305821 is 1285035842.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1285035842 = 2 ⋅642517921.

It is a cyclic number.

It is not a de Polignac number, because 2485305821 - 2² = 2485305817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2485305827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623405 + ... + 627378.

It is an arithmetic number, because the mean of its divisors is an integer number (621639648).

Almost surely, 2^2485305821 is an apocalyptic number.

It is an amenable number.

2485305821 is a deficient number, since it is larger than the sum of its proper divisors (1252771).

2485305821 is a wasteful number, since it uses less digits than its factorization.

2485305821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252770.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 2485305821 is about 49852.8416542127. The cubic root of 2485305821 is about 1354.5445056046.

The spelling of 2485305821 in words is "two billion, four hundred eighty-five million, three hundred five thousand, eight hundred twenty-one".