7721422331 has 16 divisors (see below), whose sum is σ = 9298828800. Its totient is φ = 6263345088.

The previous prime is 7721422279. The next prime is 7721422337. The reversal of 7721422331 is 1332241277.

It is not a de Polignac number, because 7721422331 - 2¹⁴ = 7721405947 is a prime.

It is a super-2 number, since 2×7721422331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7721422337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96290 + ... + 157208.

It is an arithmetic number, because the mean of its divisors is an integer number (581176800).

Almost surely, 2^7721422331 is an apocalyptic number.

7721422331 is a deficient number, since it is larger than the sum of its proper divisors (1577406469).

7721422331 is a wasteful number, since it uses less digits than its factorization.

7721422331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61898.

The product of its digits is 14112, while the sum is 32.

The square root of 7721422331 is about 87871.6241513721. The cubic root of 7721422331 is about 1976.5103934985.

The spelling of 7721422331 in words is "seven billion, seven hundred twenty-one million, four hundred twenty-two thousand, three hundred thirty-one".