7221420003 has 16 divisors (see below), whose sum is σ = 11583230720. Its totient is φ = 3909339936.

The previous prime is 7221419969. The next prime is 7221420029. The reversal of 7221420003 is 3000241227.

It is not a de Polignac number, because 7221420003 - 2⁶ = 7221419939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221420053) 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, 9049000 + ... + 9049797.

It is an arithmetic number, because the mean of its divisors is an integer number (723951920).

Almost surely, 2^7221420003 is an apocalyptic number.

7221420003 is a deficient number, since it is larger than the sum of its proper divisors (4361810717).

7221420003 is a wasteful number, since it uses less digits than its factorization.

7221420003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18098826.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 7221420003 is about 84978.9385848046. The cubic root of 7221420003 is about 1932.8917609608.

The spelling of 7221420003 in words is "seven billion, two hundred twenty-one million, four hundred twenty thousand, three".