726543251 has 16 divisors (see below), whose sum is σ = 873283584. Its totient is φ = 590968224.

The previous prime is 726543217. The next prime is 726543253. The reversal of 726543251 is 152345627.

It is a de Polignac number, because none of the positive numbers 2^k-726543251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726543253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2681 + ... + 38213.

It is an arithmetic number, because the mean of its divisors is an integer number (54580224).

Almost surely, 2^726543251 is an apocalyptic number.

726543251 is a deficient number, since it is larger than the sum of its proper divisors (146740333).

726543251 is a wasteful number, since it uses less digits than its factorization.

726543251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35690.

The product of its digits is 50400, while the sum is 35.

The square root of 726543251 is about 26954.4662532946. The cubic root of 726543251 is about 898.9878543424.

Adding to 726543251 its reverse (152345627), we get a palindrome (878888878).

The spelling of 726543251 in words is "seven hundred twenty-six million, five hundred forty-three thousand, two hundred fifty-one".