2521221373 has 8 divisors (see below), whose sum is σ = 2758736736. Its totient is φ = 2285091600.

The previous prime is 2521221341. The next prime is 2521221377. The reversal of 2521221373 is 3731221252.

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

It is not a de Polignac number, because 2521221373 - 2⁵ = 2521221341 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 (2521221377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342586 + ... + 349867.

It is an arithmetic number, because the mean of its divisors is an integer number (344842092).

Almost surely, 2^2521221373 is an apocalyptic number.

It is an amenable number.

2521221373 is a deficient number, since it is larger than the sum of its proper divisors (237515363).

2521221373 is a wasteful number, since it uses less digits than its factorization.

2521221373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692795.

The product of its digits is 5040, while the sum is 28.

The square root of 2521221373 is about 50211.7652846422. The cubic root of 2521221373 is about 1361.0382377982.

The spelling of 2521221373 in words is "two billion, five hundred twenty-one million, two hundred twenty-one thousand, three hundred seventy-three".