721256230 has 16 divisors (see below), whose sum is σ = 1340141184. Its totient is φ = 279195840.

The previous prime is 721256213. The next prime is 721256293. The reversal of 721256230 is 32652127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163007 + ... + 1163626.

It is an arithmetic number, because the mean of its divisors is an integer number (83758824).

Almost surely, 2^721256230 is an apocalyptic number.

721256230 is a deficient number, since it is larger than the sum of its proper divisors (618884954).

721256230 is a wasteful number, since it uses less digits than its factorization.

721256230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326671.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 721256230 is about 26856.2139922961. The cubic root of 721256230 is about 896.8019126543.

The spelling of 721256230 in words is "seven hundred twenty-one million, two hundred fifty-six thousand, two hundred thirty".