311641 has 8 divisors (see below), whose sum is σ = 348768. Its totient is φ = 276000.

The previous prime is 311609. The next prime is 311653. The reversal of 311641 is 146113.

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 311641 - 2⁵ = 311609 is a prime.

It is a super-2 number, since 2×311641² = 194240225762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106 + ... + 796.

It is an arithmetic number, because the mean of its divisors is an integer number (43596).

2³¹¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

311641 is a deficient number, since it is larger than the sum of its proper divisors (37127).

311641 is a wasteful number, since it uses less digits than its factorization.

311641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743.

The product of its digits is 72, while the sum is 16.

The square root of 311641 is about 558.2481527063. The cubic root of 311641 is about 67.7982050963.

Adding to 311641 its reverse (146113), we get a palindrome (457754).

The spelling of 311641 in words is "three hundred eleven thousand, six hundred forty-one".