31401 has 8 divisors (see below), whose sum is σ = 46560. Its totient is φ = 20916.
The previous prime is 31397. The next prime is 31469. The reversal of 31401 is 10413.
It is not a de Polignac number, because 31401 - 22 = 31397 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31401.
It is not an unprimeable number, because it can be changed into a prime (31481) 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, 555 + ... + 608.
It is an arithmetic number, because the mean of its divisors is an integer number (5820).
231401 is an apocalyptic number.
It is an amenable number.
31401 is a deficient number, since it is larger than the sum of its proper divisors (15159).
31401 is a wasteful number, since it uses less digits than its factorization.
31401 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1172 (or 1166 counting only the distinct ones).
The product of its (nonzero) digits is 12, while the sum is 9.
The square root of 31401 is about 177.2032731075. The cubic root of 31401 is about 31.5486775733.
Adding to 31401 its product of nonzero digits (12), we get a palindrome (31413).
Adding to 31401 its reverse (10413), we get a palindrome (41814).
The spelling of 31401 in words is "thirty-one thousand, four hundred one".
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