721201231 has 8 divisors (see below), whose sum is σ = 735220304. Its totient is φ = 707253120.

The previous prime is 721201223. The next prime is 721201301. The reversal of 721201231 is 132102127.

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 721201231 - 2³ = 721201223 is a prime.

It is a super-2 number, since 2×721201231² = 1040262431191830722, 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 = 721201199 and 721201208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721201211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3016 + ... + 38098.

It is an arithmetic number, because the mean of its divisors is an integer number (91902538).

Almost surely, 2^721201231 is an apocalyptic number.

721201231 is a deficient number, since it is larger than the sum of its proper divisors (14019073).

721201231 is a wasteful number, since it uses less digits than its factorization.

721201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35481.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 721201231 is about 26855.1900198081. The cubic root of 721201231 is about 896.7791170282.

Adding to 721201231 its reverse (132102127), we get a palindrome (853303358).

The spelling of 721201231 in words is "seven hundred twenty-one million, two hundred one thousand, two hundred thirty-one".