2522516021 has 8 divisors (see below), whose sum is σ = 2584716288. Its totient is φ = 2460348000.

The previous prime is 2522515999. The next prime is 2522516023. The reversal of 2522516021 is 1206152252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2522516021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2522516023) 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, 252206 + ... + 262016.

It is an arithmetic number, because the mean of its divisors is an integer number (323089536).

Almost surely, 2^2522516021 is an apocalyptic number.

It is an amenable number.

2522516021 is a deficient number, since it is larger than the sum of its proper divisors (62200267).

2522516021 is an equidigital number, since it uses as much as digits as its factorization.

2522516021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16123.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2522516021 is about 50224.6555090227. The cubic root of 2522516021 is about 1361.2711624607.

Adding to 2522516021 its reverse (1206152252), we get a palindrome (3728668273).

The spelling of 2522516021 in words is "two billion, five hundred twenty-two million, five hundred sixteen thousand, twenty-one".