7221774631 has 4 divisors (see below), whose sum is σ = 7229213064. Its totient is φ = 7214336200.

The previous prime is 7221774629. The next prime is 7221774643. The reversal of 7221774631 is 1364771227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7221774631 - 2¹ = 7221774629 is a prime.

It is a super-2 number, since 2×7221774631² (a number of 21 digits) contains 22 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 (7221774431) 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, 3717760 + ... + 3719701.

It is an arithmetic number, because the mean of its divisors is an integer number (1807303266).

Almost surely, 2^7221774631 is an apocalyptic number.

7221774631 is a deficient number, since it is larger than the sum of its proper divisors (7438433).

7221774631 is an equidigital number, since it uses as much as digits as its factorization.

7221774631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7438432.

The product of its digits is 98784, while the sum is 40.

The square root of 7221774631 is about 84981.0251232591. The cubic root of 7221774631 is about 1932.9234004592.

The spelling of 7221774631 in words is "seven billion, two hundred twenty-one million, seven hundred seventy-four thousand, six hundred thirty-one".