140406231205 has 16 divisors (see below), whose sum is σ = 170692633584. Its totient is φ = 110861900800.

The previous prime is 140406231193. The next prime is 140406231233. The reversal of 140406231205 is 502132604041.

It can be written as a sum of positive squares in 8 ways, for example, as 2473470756 + 137932760449 = 49734^2 + 371393^2 .

It is not a de Polignac number, because 140406231205 - 2¹⁵ = 140406198437 is a prime.

It is a super-2 number, since 2×140406231205² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278452 + ... + 598621.

It is an arithmetic number, because the mean of its divisors is an integer number (10668289599).

Almost surely, 2^140406231205 is an apocalyptic number.

It is an amenable number.

140406231205 is a deficient number, since it is larger than the sum of its proper divisors (30286402379).

140406231205 is a wasteful number, since it uses less digits than its factorization.

140406231205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877496.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 140406231205 its reverse (502132604041), we get a palindrome (642538835246).

The spelling of 140406231205 in words is "one hundred forty billion, four hundred six million, two hundred thirty-one thousand, two hundred five".