140218345 has 8 divisors (see below), whose sum is σ = 172809864. Its totient is φ = 109142784.

The previous prime is 140218333. The next prime is 140218361. The reversal of 140218345 is 543812041.

It can be written as a sum of positive squares in 4 ways, for example, as 46457856 + 93760489 = 6816^2 + 9683^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140218345 - 2¹³ = 140210153 is a prime.

It is a super-2 number, since 2×140218345² = 39322368549078050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378784 + ... + 379153.

It is an arithmetic number, because the mean of its divisors is an integer number (21601233).

Almost surely, 2^140218345 is an apocalyptic number.

It is an amenable number.

140218345 is a deficient number, since it is larger than the sum of its proper divisors (32591519).

140218345 is an equidigital number, since it uses as much as digits as its factorization.

140218345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757979.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 140218345 is about 11841.3827317590. The cubic root of 140218345 is about 519.5192116686.

It can be divided in two parts, 14021 and 8345, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 140218345 in words is "one hundred forty million, two hundred eighteen thousand, three hundred forty-five".