7237203221 has 2 divisors, whose sum is σ = 7237203222. Its totient is φ = 7237203220.

The previous prime is 7237203187. The next prime is 7237203223. The reversal of 7237203221 is 1223027327.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4611768100 + 2625435121 = 67910^2 + 51239^2 .

It is a cyclic number.

It is not a de Polignac number, because 7237203221 - 2⁶ = 7237203157 is a prime.

It is a super-2 number, since 2×7237203221² (a number of 21 digits) contains 22 as substring.

Together with 7237203223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7237203223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3618601610 + 3618601611.

It is an arithmetic number, because the mean of its divisors is an integer number (3618601611).

Almost surely, 2^7237203221 is an apocalyptic number.

It is an amenable number.

7237203221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7237203221 is an equidigital number, since it uses as much as digits as its factorization.

7237203221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 7237203221 is about 85071.7533673781. The cubic root of 7237203221 is about 1934.2989197238.

The spelling of 7237203221 in words is "seven billion, two hundred thirty-seven million, two hundred three thousand, two hundred twenty-one".