43021245681137 has 2 divisors, whose sum is σ = 43021245681138. Its totient is φ = 43021245681136.

The previous prime is 43021245681133. The next prime is 43021245681151. The reversal of 43021245681137 is 73118654212034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40473020909281 + 2548224771856 = 6361841^2 + 1596316^2 .

It is a cyclic number.

It is not a de Polignac number, because 43021245681137 - 2² = 43021245681133 is a prime.

It is a super-2 number, since 2×43021245681137² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43021245681091 and 43021245681100.

It is not a weakly prime, because it can be changed into another prime (43021245681133) 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 as a sum of consecutive naturals, namely, 21510622840568 + 21510622840569.

It is an arithmetic number, because the mean of its divisors is an integer number (21510622840569).

Almost surely, 2^{43021245681137} is an apocalyptic number.

It is an amenable number.

43021245681137 is a deficient number, since it is larger than the sum of its proper divisors (1).

43021245681137 is an equidigital number, since it uses as much as digits as its factorization.

43021245681137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 43021245681137 in words is "forty-three trillion, twenty-one billion, two hundred forty-five million, six hundred eighty-one thousand, one hundred thirty-seven".