31432 has 8 divisors (see below), whose sum is σ = 58950. Its totient is φ = 15712.
The previous prime is 31397. The next prime is 31469. The reversal of 31432 is 23413.
It can be written as a sum of positive squares in only one way, i.e., 30276 + 1156 = 174^2 + 34^2 .
It is a tau number, because it is divible by the number of its divisors (8).
It is a lonely number, since its distance to closest prime (31397) sets a new record.
It is a nialpdrome in base 8 and base 14.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957 + ... + 1972.
231432 is an apocalyptic number.
It is an amenable number.
31432 is a deficient number, since it is larger than the sum of its proper divisors (27518).
31432 is a wasteful number, since it uses less digits than its factorization.
31432 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3935 (or 3931 counting only the distinct ones).
The product of its digits is 72, while the sum is 13.
The square root of 31432 is about 177.2907216974. The cubic root of 31432 is about 31.5590560893.
Adding to 31432 its reverse (23413), we get a palindrome (54845).
The spelling of 31432 in words is "thirty-one thousand, four hundred thirty-two".
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