2420521555 has 8 divisors (see below), whose sum is σ = 2905120800. Its totient is φ = 1936087296.

The previous prime is 2420521553. The next prime is 2420521559. The reversal of 2420521555 is 5551250242.

It is a happy number.

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 2420521555 - 2¹ = 2420521553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2420521553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6270 + ... + 69859.

It is an arithmetic number, because the mean of its divisors is an integer number (363140100).

Almost surely, 2^2420521555 is an apocalyptic number.

2420521555 is a deficient number, since it is larger than the sum of its proper divisors (484599245).

2420521555 is an equidigital number, since it uses as much as digits as its factorization.

2420521555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82493.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 2420521555 is about 49198.7962759253. The cubic root of 2420521555 is about 1342.6711319261.

Adding to 2420521555 its reverse (5551250242), we get a palindrome (7971771797).

The spelling of 2420521555 in words is "two billion, four hundred twenty million, five hundred twenty-one thousand, five hundred fifty-five".