2521201623 has 8 divisors (see below), whose sum is σ = 3477519600. Its totient is φ = 1622842368.

The previous prime is 2521201607. The next prime is 2521201663. The reversal of 2521201623 is 3261021252.

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

It is not a de Polignac number, because 2521201623 - 2⁴ = 2521201607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2521201593 and 2521201602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521201663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14489578 + ... + 14489751.

It is an arithmetic number, because the mean of its divisors is an integer number (434689950).

Almost surely, 2^2521201623 is an apocalyptic number.

2521201623 is a deficient number, since it is larger than the sum of its proper divisors (956317977).

2521201623 is a wasteful number, since it uses less digits than its factorization.

2521201623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28979361.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2521201623 is about 50211.5686172022. The cubic root of 2521201623 is about 1361.0346838891.

Adding to 2521201623 its reverse (3261021252), we get a palindrome (5782222875).

The spelling of 2521201623 in words is "two billion, five hundred twenty-one million, two hundred one thousand, six hundred twenty-three".