140522181 has 4 divisors (see below), whose sum is σ = 187362912. Its totient is φ = 93681452.

The previous prime is 140522177. The next prime is 140522219. The reversal of 140522181 is 181225041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 181225041 = 3 ⋅60408347.

It is a cyclic number.

It is not a de Polignac number, because 140522181 - 2² = 140522177 is a prime.

It is a super-2 number, since 2×140522181² = 39492966705993522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140522131) 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, 23420361 + ... + 23420366.

It is an arithmetic number, because the mean of its divisors is an integer number (46840728).

Almost surely, 2^140522181 is an apocalyptic number.

It is an amenable number.

140522181 is a deficient number, since it is larger than the sum of its proper divisors (46840731).

140522181 is an equidigital number, since it uses as much as digits as its factorization.

140522181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46840730.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 140522181 is about 11854.2052032180. The cubic root of 140522181 is about 519.8941858166.

The spelling of 140522181 in words is "one hundred forty million, five hundred twenty-two thousand, one hundred eighty-one".