7221637133 has 4 divisors (see below), whose sum is σ = 7230814080. Its totient is φ = 7212460188.

The previous prime is 7221637127. The next prime is 7221637151. The reversal of 7221637133 is 3317361227.

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 a cyclic number.

It is not a de Polignac number, because 7221637133 - 2⁴ = 7221637117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7221637093 and 7221637102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221637153) 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, 4587293 + ... + 4588866.

It is an arithmetic number, because the mean of its divisors is an integer number (1807703520).

Almost surely, 2^7221637133 is an apocalyptic number.

It is an amenable number.

7221637133 is a deficient number, since it is larger than the sum of its proper divisors (9176947).

7221637133 is an equidigital number, since it uses as much as digits as its factorization.

7221637133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176946.

The product of its digits is 31752, while the sum is 35.

The square root of 7221637133 is about 84980.2161270492. The cubic root of 7221637133 is about 1932.9111331702.

The spelling of 7221637133 in words is "seven billion, two hundred twenty-one million, six hundred thirty-seven thousand, one hundred thirty-three".