140217331 has 4 divisors (see below), whose sum is σ = 140283072. Its totient is φ = 140151592.

The previous prime is 140217313. The next prime is 140217353. The reversal of 140217331 is 133712041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133712041 = 23 ⋅5813567.

It is a cyclic number.

It is not a de Polignac number, because 140217331 - 2⁹ = 140216819 is a prime.

It is a super-2 number, since 2×140217331² = 39321799825527122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140217431) 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, 29560 + ... + 33973.

It is an arithmetic number, because the mean of its divisors is an integer number (35070768).

Almost surely, 2^140217331 is an apocalyptic number.

140217331 is a deficient number, since it is larger than the sum of its proper divisors (65741).

140217331 is an equidigital number, since it uses as much as digits as its factorization.

140217331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65740.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 140217331 is about 11841.3399157359. The cubic root of 140217331 is about 519.5179593509.

Adding to 140217331 its reverse (133712041), we get a palindrome (273929372).

The spelling of 140217331 in words is "one hundred forty million, two hundred seventeen thousand, three hundred thirty-one".