1001722231 has 2 divisors, whose sum is σ = 1001722232. Its totient is φ = 1001722230.

The previous prime is 1001722223. The next prime is 1001722283. The reversal of 1001722231 is 1322271001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001722231 - 2³ = 1001722223 is a prime.

It is a super-2 number, since 2×1001722231² = 2006894856159234722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001722199 and 1001722208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001722831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500861115 + 500861116.

It is an arithmetic number, because the mean of its divisors is an integer number (500861116).

Almost surely, 2^1001722231 is an apocalyptic number.

1001722231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001722231 is an equidigital number, since it uses as much as digits as its factorization.

1001722231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1001722231 is about 31649.9957503947. The cubic root of 1001722231 is about 1000.5737477506.

Adding to 1001722231 its reverse (1322271001), we get a palindrome (2323993232).

The spelling of 1001722231 in words is "one billion, one million, seven hundred twenty-two thousand, two hundred thirty-one".