7221279429 has 24 divisors (see below), whose sum is σ = 12837831552. Its totient is φ = 3809026080.

The previous prime is 7221279391. The next prime is 7221279449. The reversal of 7221279429 is 9249721227.

It is a happy number.

7221279429 is a `hidden beast` number, since 7 + 2 + 212 + 7 + 9 + 429 = 666.

It is not a de Polignac number, because 7221279429 - 2⁸ = 7221279173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221279449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4407777 + ... + 4409414.

It is an arithmetic number, because the mean of its divisors is an integer number (534909648).

Almost surely, 2^7221279429 is an apocalyptic number.

It is an amenable number.

7221279429 is a deficient number, since it is larger than the sum of its proper divisors (5616552123).

7221279429 is a wasteful number, since it uses less digits than its factorization.

7221279429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8817217 (or 8817214 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 7221279429 is about 84978.1114699544. Note that the first 3 decimals coincide. The cubic root of 7221279429 is about 1932.8792188251.

The spelling of 7221279429 in words is "seven billion, two hundred twenty-one million, two hundred seventy-nine thousand, four hundred twenty-nine".