7880142221 has 24 divisors (see below), whose sum is σ = 9339144480. Its totient is φ = 6628118112.

The previous prime is 7880142191. The next prime is 7880142233. The reversal of 7880142221 is 1222410887.

It is not a de Polignac number, because 7880142221 - 2²² = 7875947917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7880142521) 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 23 ways as a sum of consecutive naturals, for example, 878666 + ... + 887588.

It is an arithmetic number, because the mean of its divisors is an integer number (389131020).

Almost surely, 2^7880142221 is an apocalyptic number.

It is an amenable number.

7880142221 is a deficient number, since it is larger than the sum of its proper divisors (1459002259).

7880142221 is a wasteful number, since it uses less digits than its factorization.

7880142221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9273 (or 9266 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 7880142221 is about 88770.1651513615. The cubic root of 7880142221 is about 1989.9615508173.

The spelling of 7880142221 in words is "seven billion, eight hundred eighty million, one hundred forty-two thousand, two hundred twenty-one".