13840025221 has 32 divisors (see below), whose sum is σ = 16330533120. Its totient is φ = 11596569600.

The previous prime is 13840025197. The next prime is 13840025273. The reversal of 13840025221 is 12252004831.

It is not a de Polignac number, because 13840025221 - 2¹¹ = 13840023173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13840025221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13840025291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4349251 + ... + 4352431.

It is an arithmetic number, because the mean of its divisors is an integer number (510329160).

Almost surely, 2^13840025221 is an apocalyptic number.

13840025221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13840025221 is a deficient number, since it is larger than the sum of its proper divisors (2490507899).

13840025221 is a wasteful number, since it uses less digits than its factorization.

13840025221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837.

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

The spelling of 13840025221 in words is "thirteen billion, eight hundred forty million, twenty-five thousand, two hundred twenty-one".