7237345221 has 20 divisors (see below), whose sum is σ = 10866246732. Its totient is φ = 4800394368.

The previous prime is 7237345217. The next prime is 7237345229. The reversal of 7237345221 is 1225437327.

7237345221 is a `hidden beast` number, since 72 + 37 + 34 + 522 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6634102500 + 603242721 = 81450^2 + 24561^2 .

It is not a de Polignac number, because 7237345221 - 2² = 7237345217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7237345229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 210820 + ... + 242733.

Almost surely, 2^7237345221 is an apocalyptic number.

It is an amenable number.

7237345221 is a deficient number, since it is larger than the sum of its proper divisors (3628901511).

7237345221 is a wasteful number, since it uses less digits than its factorization.

7237345221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453762 (or 453753 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 7237345221 is about 85072.5879528770. The cubic root of 7237345221 is about 1934.3115704970.

The spelling of 7237345221 in words is "seven billion, two hundred thirty-seven million, three hundred forty-five thousand, two hundred twenty-one".