2621540224 has 16 divisors (see below), whose sum is σ = 5222599920. Its totient is φ = 1310770048.

The previous prime is 2621540213. The next prime is 2621540227. The reversal of 2621540224 is 4220451262.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 2621540192 and 2621540201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621540227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10240264 + ... + 10240519.

It is an arithmetic number, because the mean of its divisors is an integer number (326412495).

Almost surely, 2^2621540224 is an apocalyptic number.

It is an amenable number.

2621540224 is a deficient number, since it is larger than the sum of its proper divisors (2601059696).

2621540224 is an equidigital number, since it uses as much as digits as its factorization.

2621540224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20480797 (or 20480785 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 2621540224 is about 51200.9787406452. The cubic root of 2621540224 is about 1378.8557735044.

Adding to 2621540224 its reverse (4220451262), we get a palindrome (6841991486).

The spelling of 2621540224 in words is "two billion, six hundred twenty-one million, five hundred forty thousand, two hundred twenty-four".