43201504781 has 2 divisors, whose sum is σ = 43201504782. Its totient is φ = 43201504780.

The previous prime is 43201504757. The next prime is 43201504867. The reversal of 43201504781 is 18740510234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24127408900 + 19074095881 = 155330^2 + 138109^2 .

It is a cyclic number.

It is not a de Polignac number, because 43201504781 - 2¹⁴ = 43201488397 is a prime.

It is a super-2 number, since 2×43201504781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43201504481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21600752390 + 21600752391.

It is an arithmetic number, because the mean of its divisors is an integer number (21600752391).

Almost surely, 2^43201504781 is an apocalyptic number.

It is an amenable number.

43201504781 is a deficient number, since it is larger than the sum of its proper divisors (1).

43201504781 is an equidigital number, since it uses as much as digits as its factorization.

43201504781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 43201504781 in words is "forty-three billion, two hundred one million, five hundred four thousand, seven hundred eighty-one".