720231722 has 16 divisors (see below), whose sum is σ = 1235051712. Its totient is φ = 308578560.

The previous prime is 720231671. The next prime is 720231737. The reversal of 720231722 is 227132027.

It is a junction number, because it is equal to n+sod(n) for n = 720231691 and 720231700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63818 + ... + 74250.

It is an arithmetic number, because the mean of its divisors is an integer number (77190732).

Almost surely, 2^720231722 is an apocalyptic number.

720231722 is a deficient number, since it is larger than the sum of its proper divisors (514819990).

720231722 is a wasteful number, since it uses less digits than its factorization.

720231722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15373.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 720231722 is about 26837.1332671729. The cubic root of 720231722 is about 896.3770908566.

Adding to 720231722 its reverse (227132027), we get a palindrome (947363749).

The spelling of 720231722 in words is "seven hundred twenty million, two hundred thirty-one thousand, seven hundred twenty-two".