43215635403641 has 2 divisors, whose sum is σ = 43215635403642. Its totient is φ = 43215635403640.

The previous prime is 43215635403623. The next prime is 43215635403653. The reversal of 43215635403641 is 14630453651234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42955964646400 + 259670757241 = 6554080^2 + 509579^2 .

It is a cyclic number.

It is not a de Polignac number, because 43215635403641 - 2²² = 43215631209337 is a prime.

It is a super-2 number, since 2×43215635403641² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43215635403691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21607817701820 + 21607817701821.

It is an arithmetic number, because the mean of its divisors is an integer number (21607817701821).

Almost surely, 2^{43215635403641} is an apocalyptic number.

It is an amenable number.

43215635403641 is a deficient number, since it is larger than the sum of its proper divisors (1).

43215635403641 is an equidigital number, since it uses as much as digits as its factorization.

43215635403641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 43215635403641 in words is "forty-three trillion, two hundred fifteen billion, six hundred thirty-five million, four hundred three thousand, six hundred forty-one".