140565881 has 4 divisors (see below), whose sum is σ = 140629632. Its totient is φ = 140502132.

The previous prime is 140565869. The next prime is 140565889. The reversal of 140565881 is 188565041.

140565881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140565881 is a prime.

It is a super-2 number, since 2×140565881² = 39517533802612322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140565889) 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, 28445 + ... + 33018.

It is an arithmetic number, because the mean of its divisors is an integer number (35157408).

Almost surely, 2^140565881 is an apocalyptic number.

It is an amenable number.

140565881 is a deficient number, since it is larger than the sum of its proper divisors (63751).

140565881 is an equidigital number, since it uses as much as digits as its factorization.

140565881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63750.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 140565881 is about 11856.0482876884. The cubic root of 140565881 is about 519.9480729706.

The spelling of 140565881 in words is "one hundred forty million, five hundred sixty-five thousand, eight hundred eighty-one".