101440085 has 4 divisors (see below), whose sum is σ = 121728108. Its totient is φ = 81152064.

The previous prime is 101440081. The next prime is 101440093. The reversal of 101440085 is 580044101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71944324 + 29495761 = 8482^2 + 5431^2 .

It is a cyclic number.

It is not a de Polignac number, because 101440085 - 2² = 101440081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101440085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101440081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10144004 + ... + 10144013.

It is an arithmetic number, because the mean of its divisors is an integer number (30432027).

Almost surely, 2^101440085 is an apocalyptic number.

It is an amenable number.

101440085 is a deficient number, since it is larger than the sum of its proper divisors (20288023).

101440085 is an equidigital number, since it uses as much as digits as its factorization.

101440085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20288022.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 101440085 is about 10071.7468693370. The cubic root of 101440085 is about 466.3763667859.

Adding to 101440085 its reverse (580044101), we get a palindrome (681484186).

The spelling of 101440085 in words is "one hundred one million, four hundred forty thousand, eighty-five".