7900221451 has 16 divisors (see below), whose sum is σ = 8459798400. Its totient is φ = 7355544768.

The previous prime is 7900221449. The next prime is 7900221467. The reversal of 7900221451 is 1541220097.

It is a cyclic number.

It is not a de Polignac number, because 7900221451 - 2¹ = 7900221449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7900221421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556935 + ... + 570943.

It is an arithmetic number, because the mean of its divisors is an integer number (528737400).

Almost surely, 2^7900221451 is an apocalyptic number.

7900221451 is a deficient number, since it is larger than the sum of its proper divisors (559576949).

7900221451 is a wasteful number, since it uses less digits than its factorization.

7900221451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14538.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 7900221451 is about 88883.1899236295. The cubic root of 7900221451 is about 1991.6503107714.

The spelling of 7900221451 in words is "seven billion, nine hundred million, two hundred twenty-one thousand, four hundred fifty-one".