2520263621 has 8 divisors (see below), whose sum is σ = 2595724824. Its totient is φ = 2445189120.

The previous prime is 2520263597. The next prime is 2520263623. The reversal of 2520263621 is 1263620252.

It can be written as a sum of positive squares in 4 ways, for example, as 879122500 + 1641141121 = 29650^2 + 40511^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2520263621 - 2¹⁴ = 2520247237 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 (2520263623) 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, 83420 + ... + 109541.

It is an arithmetic number, because the mean of its divisors is an integer number (324465603).

Almost surely, 2^2520263621 is an apocalyptic number.

It is an amenable number.

2520263621 is a deficient number, since it is larger than the sum of its proper divisors (75461203).

2520263621 is a wasteful number, since it uses less digits than its factorization.

2520263621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193351.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2520263621 is about 50202.2272513880. The cubic root of 2520263621 is about 1360.8658739585.

Adding to 2520263621 its reverse (1263620252), we get a palindrome (3783883873).

The spelling of 2520263621 in words is "two billion, five hundred twenty million, two hundred sixty-three thousand, six hundred twenty-one".