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31201330 = 2513922447
BaseRepresentation
bin111011100000…
…1100000110010
32011201012011211
41313001200302
530441420310
63032430334
7526130656
oct167014062
964635154
1031201330
1116681026
12a5483aa
136605a34
144202a66
152b14c8a
hex1dc1832

31201330 has 16 divisors (see below), whose sum is σ = 56568960. Its totient is φ = 12390192.

The previous prime is 31201327. The next prime is 31201337. The reversal of 31201330 is 3310213.

It is a self number, because there is not a number n which added to its sum of digits gives 31201330.

It is not an unprimeable number, because it can be changed into a prime (31201337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9834 + ... + 12613.

It is an arithmetic number, because the mean of its divisors is an integer number (3535560).

Almost surely, 231201330 is an apocalyptic number.

31201330 is a deficient number, since it is larger than the sum of its proper divisors (25367630).

31201330 is a wasteful number, since it uses less digits than its factorization.

31201330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22593.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 31201330 is about 5585.8150703366. The cubic root of 31201330 is about 314.8166565555.

Adding to 31201330 its reverse (3310213), we get a palindrome (34511543).

The spelling of 31201330 in words is "thirty-one million, two hundred one thousand, three hundred thirty".

Divisors: 1 2 5 10 139 278 695 1390 22447 44894 112235 224470 3120133 6240266 15600665 31201330