722224731 has 4 divisors (see below), whose sum is σ = 962966312. Its totient is φ = 481483152.

The previous prime is 722224661. The next prime is 722224739. The reversal of 722224731 is 137422227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137422227 = 3 ⋅45807409.

It is not a de Polignac number, because 722224731 - 2¹⁹ = 721700443 is a prime.

It is a super-2 number, since 2×722224731² = 1043217124136044722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722224739) 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, 120370786 + ... + 120370791.

It is an arithmetic number, because the mean of its divisors is an integer number (240741578).

Almost surely, 2^722224731 is an apocalyptic number.

722224731 is a deficient number, since it is larger than the sum of its proper divisors (240741581).

722224731 is a wasteful number, since it uses less digits than its factorization.

722224731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240741580.

The product of its digits is 9408, while the sum is 30.

The square root of 722224731 is about 26874.2391706258. The cubic root of 722224731 is about 897.2031408814.

Adding to 722224731 its reverse (137422227), we get a palindrome (859646958).

The spelling of 722224731 in words is "seven hundred twenty-two million, two hundred twenty-four thousand, seven hundred thirty-one".