2538122221 has 8 divisors (see below), whose sum is σ = 2583936800. Its totient is φ = 2492443440.

The previous prime is 2538122183. The next prime is 2538122269. The reversal of 2538122221 is 1222218352.

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 2538122221 - 2²¹ = 2536025069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2538122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538123221) 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, 4150 + ... + 71368.

It is an arithmetic number, because the mean of its divisors is an integer number (322992100).

Almost surely, 2^2538122221 is an apocalyptic number.

It is an amenable number.

2538122221 is a deficient number, since it is larger than the sum of its proper divisors (45814579).

2538122221 is an equidigital number, since it uses as much as digits as its factorization.

2538122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67899.

The product of its digits is 3840, while the sum is 28.

The square root of 2538122221 is about 50379.7798824092. The cubic root of 2538122221 is about 1364.0726787167.

The spelling of 2538122221 in words is "two billion, five hundred thirty-eight million, one hundred twenty-two thousand, two hundred twenty-one".