722147431 has 8 divisors (see below), whose sum is σ = 728348544. Its totient is φ = 715972320.

The previous prime is 722147429. The next prime is 722147467. The reversal of 722147431 is 134741227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 722147431 - 2¹ = 722147429 is a prime.

It is a super-2 number, since 2×722147431² = 1042993824199799522, 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 = 722147393 and 722147402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722147401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51466 + ... + 63976.

It is an arithmetic number, because the mean of its divisors is an integer number (91043568).

Almost surely, 2^722147431 is an apocalyptic number.

722147431 is a deficient number, since it is larger than the sum of its proper divisors (6201113).

722147431 is a wasteful number, since it uses less digits than its factorization.

722147431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13001.

The product of its digits is 9408, while the sum is 31.

The square root of 722147431 is about 26872.8009518919. The cubic root of 722147431 is about 897.1711304030.

Adding to 722147431 its reverse (134741227), we get a palindrome (856888658).

The spelling of 722147431 in words is "seven hundred twenty-two million, one hundred forty-seven thousand, four hundred thirty-one".