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31153164 = 2237370871
BaseRepresentation
bin111011011010…
…1110000001100
32011121202002220
41312311300030
530433400124
63031415340
7525540360
oct166656014
964552086
1031153164
1116648919
12a524550
1365b9b33
1441cd2a0
152b05879
hex1db5c0c

31153164 has 24 divisors (see below), whose sum is σ = 83075328. Its totient is φ = 8900880.

The previous prime is 31153093. The next prime is 31153169. The reversal of 31153164 is 46135113.

It is not an unprimeable number, because it can be changed into a prime (31153169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185352 + ... + 185519.

It is an arithmetic number, because the mean of its divisors is an integer number (3461472).

Almost surely, 231153164 is an apocalyptic number.

It is an amenable number.

31153164 is an abundant number, since it is smaller than the sum of its proper divisors (51922164).

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

31153164 is a wasteful number, since it uses less digits than its factorization.

31153164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370885 (or 370883 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 31153164 is about 5581.5019484006. The cubic root of 31153164 is about 314.6545772630.

Adding to 31153164 its reverse (46135113), we get a palindrome (77288277).

The spelling of 31153164 in words is "thirty-one million, one hundred fifty-three thousand, one hundred sixty-four".

Divisors: 1 2 3 4 6 7 12 14 21 28 42 84 370871 741742 1112613 1483484 2225226 2596097 4450452 5192194 7788291 10384388 15576582 31153164