2536378221 has 8 divisors (see below), whose sum is σ = 3641979040. Its totient is φ = 1560848112.

The previous prime is 2536378147. The next prime is 2536378237. The reversal of 2536378221 is 1228736352.

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

It is not a de Polignac number, because 2536378221 - 2¹¹ = 2536376173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 65035339 = 2536378221 / (2 + 5 + 3 + 6 + 3 + 7 + 8 + 2 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2536378221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2536378021) 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, 32517631 + ... + 32517708.

It is an arithmetic number, because the mean of its divisors is an integer number (455247380).

Almost surely, 2^2536378221 is an apocalyptic number.

It is an amenable number.

2536378221 is a deficient number, since it is larger than the sum of its proper divisors (1105600819).

2536378221 is a wasteful number, since it uses less digits than its factorization.

2536378221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65035355.

The product of its digits is 120960, while the sum is 39.

The square root of 2536378221 is about 50362.4683767585. The cubic root of 2536378221 is about 1363.7601789462.

The spelling of 2536378221 in words is "two billion, five hundred thirty-six million, three hundred seventy-eight thousand, two hundred twenty-one".