4243016781 has 6 divisors (see below), whose sum is σ = 6128802030. Its totient is φ = 2828677848.

The previous prime is 4243016759. The next prime is 4243016797. The reversal of 4243016781 is 1876103424.

It can be written as a sum of positive squares in only one way, i.e., 2826623556 + 1416393225 = 53166^2 + 37635^2 .

It is not a de Polignac number, because 4243016781 - 2¹⁵ = 4242984013 is a prime.

It is a super-2 number, since 2×4243016781² = 36006382807695203922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243016381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 235723146 + ... + 235723163.

It is an arithmetic number, because the mean of its divisors is an integer number (1021467005).

Almost surely, 2^4243016781 is an apocalyptic number.

It is an amenable number.

4243016781 is a deficient number, since it is larger than the sum of its proper divisors (1885785249).

4243016781 is a wasteful number, since it uses less digits than its factorization.

4243016781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471446315 (or 471446312 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 4243016781 is about 65138.4431883354. The cubic root of 4243016781 is about 1618.9182410051.

The spelling of 4243016781 in words is "four billion, two hundred forty-three million, sixteen thousand, seven hundred eighty-one".