140023111 has 4 divisors (see below), whose sum is σ = 140581224. Its totient is φ = 139465000.

The previous prime is 140023073. The next prime is 140023123. The reversal of 140023111 is 111320041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111320041 = 7 ⋅15902863.

It is a cyclic number.

It is not a de Polignac number, because 140023111 - 2²⁷ = 5805383 is a prime.

It is a super-2 number, since 2×140023111² = 39212943228236642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140023091 and 140023100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140023171) 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, 278680 + ... + 279181.

It is an arithmetic number, because the mean of its divisors is an integer number (35145306).

Almost surely, 2^140023111 is an apocalyptic number.

140023111 is a deficient number, since it is larger than the sum of its proper divisors (558113).

140023111 is an equidigital number, since it uses as much as digits as its factorization.

140023111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558112.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 140023111 is about 11833.1361438969. The cubic root of 140023111 is about 519.2779809300.

Adding to 140023111 its reverse (111320041), we get a palindrome (251343152).

The spelling of 140023111 in words is "one hundred forty million, twenty-three thousand, one hundred eleven".