722801431 has 4 divisors (see below), whose sum is σ = 788510664. Its totient is φ = 657092200.

The previous prime is 722801411. The next prime is 722801447. The reversal of 722801431 is 134108227.

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 722801431 - 2⁵ = 722801399 is a prime.

It is a super-2 number, since 2×722801431² = 1044883817311295522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 722801431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722801411) 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, 32854600 + ... + 32854621.

It is an arithmetic number, because the mean of its divisors is an integer number (197127666).

Almost surely, 2^722801431 is an apocalyptic number.

722801431 is a deficient number, since it is larger than the sum of its proper divisors (65709233).

722801431 is a wasteful number, since it uses less digits than its factorization.

722801431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65709232.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 722801431 is about 26884.9666356497. The cubic root of 722801431 is about 897.4418843870.

Adding to 722801431 its reverse (134108227), we get a palindrome (856909658).

The spelling of 722801431 in words is "seven hundred twenty-two million, eight hundred one thousand, four hundred thirty-one".