Search a number
-
+
31450 = 2521737
BaseRepresentation
bin111101011011010
31121010211
413223122
52001300
6401334
7160456
oct75332
947124
1031450
11216a1
121624a
1311413
14b666
1594ba
hex7ada

31450 has 24 divisors (see below), whose sum is σ = 63612. Its totient is φ = 11520.

The previous prime is 31397. The next prime is 31469. The reversal of 31450 is 5413.

Adding to 31450 its reverse (5413), we get a palindrome (36863).

It can be written as a sum of positive squares in 6 ways, for example, as 22801 + 8649 = 151^2 + 93^2 .

It is a nialpdrome in base 8 and base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 31450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 832 + ... + 868.

231450 is an apocalyptic number.

31450 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31806).

31450 is a wasteful number, since it uses less digits than its factorization.

31450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 31450 is about 177.3414785097. The cubic root of 31450 is about 31.5650791932.

The spelling of 31450 in words is "thirty-one thousand, four hundred fifty".

Divisors: 1 2 5 10 17 25 34 37 50 74 85 170 185 370 425 629 850 925 1258 1850 3145 6290 15725 31450