140536217 has 6 divisors (see below), whose sum is σ = 148322538. Its totient is φ = 133139232.

The previous prime is 140536213. The next prime is 140536243. The reversal of 140536217 is 712635041.

It can be written as a sum of positive squares in only one way, i.e., 116877721 + 23658496 = 10811^2 + 4864^2 .

It is not a de Polignac number, because 140536217 - 2² = 140536213 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 140536217.

It is not an unprimeable number, because it can be changed into a prime (140536211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194288 + ... + 195009.

It is an arithmetic number, because the mean of its divisors is an integer number (24720423).

Almost surely, 2^140536217 is an apocalyptic number.

It is an amenable number.

140536217 is a deficient number, since it is larger than the sum of its proper divisors (7786321).

140536217 is an equidigital number, since it uses as much as digits as its factorization.

140536217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389335 (or 389316 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 140536217 is about 11854.7972146300. The cubic root of 140536217 is about 519.9114950456.

The spelling of 140536217 in words is "one hundred forty million, five hundred thirty-six thousand, two hundred seventeen".