140465404531 has 4 divisors (see below), whose sum is σ = 145309039200. Its totient is φ = 135621769864.

The previous prime is 140465404487. The next prime is 140465404537. The reversal of 140465404531 is 135404564041.

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

It is a cyclic number.

It is not a de Polignac number, because 140465404531 - 2¹⁹ = 140464880243 is a prime.

It is a super-2 number, since 2×140465404531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140465404537) 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, 2421817291 + ... + 2421817348.

It is an arithmetic number, because the mean of its divisors is an integer number (36327259800).

Almost surely, 2^140465404531 is an apocalyptic number.

140465404531 is a deficient number, since it is larger than the sum of its proper divisors (4843634669).

140465404531 is an equidigital number, since it uses as much as digits as its factorization.

140465404531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843634668.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 140465404531 its reverse (135404564041), we get a palindrome (275869968572).

The spelling of 140465404531 in words is "one hundred forty billion, four hundred sixty-five million, four hundred four thousand, five hundred thirty-one".