128347283531 has 2 divisors, whose sum is σ = 128347283532. Its totient is φ = 128347283530.

The previous prime is 128347283431. The next prime is 128347283579. The reversal of 128347283531 is 135382743821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128347283531 - 2¹⁰ = 128347282507 is a prime.

It is a super-2 number, since 2×128347283531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128347283431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64173641765 + 64173641766.

It is an arithmetic number, because the mean of its divisors is an integer number (64173641766).

Almost surely, 2^128347283531 is an apocalyptic number.

128347283531 is a deficient number, since it is larger than the sum of its proper divisors (1).

128347283531 is an equidigital number, since it uses as much as digits as its factorization.

128347283531 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 128347283531 in words is "one hundred twenty-eight billion, three hundred forty-seven million, two hundred eighty-three thousand, five hundred thirty-one".