7201672221 has 4 divisors (see below), whose sum is σ = 9602229632. Its totient is φ = 4801114812.

The previous prime is 7201672211. The next prime is 7201672237. The reversal of 7201672221 is 1222761027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7201672221 - 2⁵ = 7201672189 is a prime.

It is a super-3 number, since 3×7201672221³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7201672211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200278701 + ... + 1200278706.

It is an arithmetic number, because the mean of its divisors is an integer number (2400557408).

Almost surely, 2^7201672221 is an apocalyptic number.

It is an amenable number.

7201672221 is a deficient number, since it is larger than the sum of its proper divisors (2400557411).

7201672221 is a wasteful number, since it uses less digits than its factorization.

7201672221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400557410.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 7201672221 is about 84862.6668270565. Note that the first 3 decimals coincide. The cubic root of 7201672221 is about 1931.1282494565.

The spelling of 7201672221 in words is "seven billion, two hundred one million, six hundred seventy-two thousand, two hundred twenty-one".