43201661422531 has 2 divisors, whose sum is σ = 43201661422532. Its totient is φ = 43201661422530.

The previous prime is 43201661422529. The next prime is 43201661422583. The reversal of 43201661422531 is 13522416610234.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43201661422531 - 2¹ = 43201661422529 is a prime.

It is a super-2 number, since 2×43201661422531² (a number of 28 digits) contains 22 as substring.

Together with 43201661422529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43201661420531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21600830711265 + 21600830711266.

It is an arithmetic number, because the mean of its divisors is an integer number (21600830711266).

Almost surely, 2^{43201661422531} is an apocalyptic number.

43201661422531 is a deficient number, since it is larger than the sum of its proper divisors (1).

43201661422531 is an equidigital number, since it uses as much as digits as its factorization.

43201661422531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 43201661422531 in words is "forty-three trillion, two hundred one billion, six hundred sixty-one million, four hundred twenty-two thousand, five hundred thirty-one".