85149101731 has 2 divisors, whose sum is σ = 85149101732. Its totient is φ = 85149101730.

The previous prime is 85149101717. The next prime is 85149101861. The reversal of 85149101731 is 13710194158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85149101731 - 2¹⁹ = 85148577443 is a prime.

It is a super-2 number, since 2×85149101731² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85149101131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42574550865 + 42574550866.

It is an arithmetic number, because the mean of its divisors is an integer number (42574550866).

Almost surely, 2^85149101731 is an apocalyptic number.

85149101731 is a deficient number, since it is larger than the sum of its proper divisors (1).

85149101731 is an equidigital number, since it uses as much as digits as its factorization.

85149101731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 40.

Adding to 85149101731 its reverse (13710194158), we get a palindrome (98859295889).

The spelling of 85149101731 in words is "eighty-five billion, one hundred forty-nine million, one hundred one thousand, seven hundred thirty-one".