2620530281 has 4 divisors (see below), whose sum is σ = 2620655700. Its totient is φ = 2620404864.

The previous prime is 2620530271. The next prime is 2620530287. The reversal of 2620530281 is 1820350262.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 471280681 + 2149249600 = 21709^2 + 46360^2 .

It is a cyclic number.

It is not a de Polignac number, because 2620530281 - 2²² = 2616335977 is a prime.

It is a super-2 number, since 2×2620530281² = 13734357907275877922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2620530287) 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, 22976 + ... + 75953.

It is an arithmetic number, because the mean of its divisors is an integer number (655163925).

Almost surely, 2^2620530281 is an apocalyptic number.

It is an amenable number.

2620530281 is a deficient number, since it is larger than the sum of its proper divisors (125419).

2620530281 is an equidigital number, since it uses as much as digits as its factorization.

2620530281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125418.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2620530281 is about 51191.1152545049. The cubic root of 2620530281 is about 1378.6786836408.

The spelling of 2620530281 in words is "two billion, six hundred twenty million, five hundred thirty thousand, two hundred eighty-one".