15705542243 has 2 divisors, whose sum is σ = 15705542244. Its totient is φ = 15705542242.

The previous prime is 15705542233. The next prime is 15705542273. The reversal of 15705542243 is 34224550751.

It is a weak prime.

It is an emirp because it is prime and its reverse (34224550751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15705542243 - 2⁶ = 15705542179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15705542197 and 15705542206.

It is not a weakly prime, because it can be changed into another prime (15705542233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7852771121 + 7852771122.

It is an arithmetic number, because the mean of its divisors is an integer number (7852771122).

Almost surely, 2^15705542243 is an apocalyptic number.

15705542243 is a deficient number, since it is larger than the sum of its proper divisors (1).

15705542243 is an equidigital number, since it uses as much as digits as its factorization.

15705542243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168000, while the sum is 38.

The spelling of 15705542243 in words is "fifteen billion, seven hundred five million, five hundred forty-two thousand, two hundred forty-three".