2581703421 has 16 divisors (see below), whose sum is σ = 3770178048. Its totient is φ = 1558430000.

The previous prime is 2581703401. The next prime is 2581703437. The reversal of 2581703421 is 1243071852.

It is a cyclic number.

It is not a de Polignac number, because 2581703421 - 2¹¹ = 2581701373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581703401) 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 15 ways as a sum of consecutive naturals, for example, 147561 + ... + 164126.

It is an arithmetic number, because the mean of its divisors is an integer number (235636128).

Almost surely, 2^2581703421 is an apocalyptic number.

It is an amenable number.

2581703421 is a deficient number, since it is larger than the sum of its proper divisors (1188474627).

2581703421 is a wasteful number, since it uses less digits than its factorization.

2581703421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311952.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 2581703421 is about 50810.4656640736. The cubic root of 2581703421 is about 1371.8357511830.

The spelling of 2581703421 in words is "two billion, five hundred eighty-one million, seven hundred three thousand, four hundred twenty-one".