722242631 has 4 divisors (see below), whose sum is σ = 787901064. Its totient is φ = 656584200.

The previous prime is 722242621. The next prime is 722242639. The reversal of 722242631 is 136242227.

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 722242631 - 2²² = 718048327 is a prime.

It is a super-2 number, since 2×722242631² = 1043268836067604322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722242594 and 722242603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722242639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32829200 + ... + 32829221.

It is an arithmetic number, because the mean of its divisors is an integer number (196975266).

Almost surely, 2^722242631 is an apocalyptic number.

722242631 is a deficient number, since it is larger than the sum of its proper divisors (65658433).

722242631 is a wasteful number, since it uses less digits than its factorization.

722242631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65658432.

The product of its digits is 8064, while the sum is 29.

The square root of 722242631 is about 26874.5722012463. The cubic root of 722242631 is about 897.2105530726.

Adding to 722242631 its reverse (136242227), we get a palindrome (858484858).

The spelling of 722242631 in words is "seven hundred twenty-two million, two hundred forty-two thousand, six hundred thirty-one".