7221530631 has 16 divisors (see below), whose sum is σ = 11359213568. Its totient is φ = 3993472800.

The previous prime is 7221530609. The next prime is 7221530653. The reversal of 7221530631 is 1360351227.

It is an interprime number because it is at equal distance from previous prime (7221530609) and next prime (7221530653).

It is not a de Polignac number, because 7221530631 - 2¹⁵ = 7221497863 is a prime.

It is a super-2 number, since 2×7221530631² (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 (7221530681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5545840 + ... + 5547141.

It is an arithmetic number, because the mean of its divisors is an integer number (709950848).

Almost surely, 2^7221530631 is an apocalyptic number.

7221530631 is a deficient number, since it is larger than the sum of its proper divisors (4137682937).

7221530631 is a wasteful number, since it uses less digits than its factorization.

7221530631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11093022.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 7221530631 is about 84979.5894965373. The cubic root of 7221530631 is about 1932.9016311737.

Adding to 7221530631 its reverse (1360351227), we get a palindrome (8581881858).

The spelling of 7221530631 in words is "seven billion, two hundred twenty-one million, five hundred thirty thousand, six hundred thirty-one".