7887862221 has 16 divisors (see below), whose sum is σ = 11033055360. Its totient is φ = 5005730240.

The previous prime is 7887862207. The next prime is 7887862231. The reversal of 7887862221 is 1222687887.

It is a cyclic number.

It is not a de Polignac number, because 7887862221 - 2⁷ = 7887862093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7887862231) 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 15 ways as a sum of consecutive naturals, for example, 632310 + ... + 644663.

It is an arithmetic number, because the mean of its divisors is an integer number (689565960).

Almost surely, 2^7887862221 is an apocalyptic number.

7887862221 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7887862221 is a deficient number, since it is larger than the sum of its proper divisors (3145193139).

7887862221 is a wasteful number, since it uses less digits than its factorization.

7887862221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277076.

The product of its digits is 1204224, while the sum is 51.

The square root of 7887862221 is about 88813.6375845512. The cubic root of 7887862221 is about 1990.6111790728.

The spelling of 7887862221 in words is "seven billion, eight hundred eighty-seven million, eight hundred sixty-two thousand, two hundred twenty-one".