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31674321 = 3772069
BaseRepresentation
bin111100011010…
…0111111010001
32012121020000000
41320310333101
531102034241
63050520213
7533140650
oct170647721
965536000
1031674321
1116974428
12a736069
136740103
1442c7197
152ba9eb6
hex1e34fd1

31674321 has 32 divisors (see below), whose sum is σ = 54316800. Its totient is φ = 18090864.

The previous prime is 31674319. The next prime is 31674329. The reversal of 31674321 is 12347613.

It is not a de Polignac number, because 31674321 - 21 = 31674319 is a prime.

It is a super-2 number, since 2×316743212 = 2006525221622082, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31674329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14275 + ... + 16343.

It is an arithmetic number, because the mean of its divisors is an integer number (1697400).

Almost surely, 231674321 is an apocalyptic number.

It is an amenable number.

31674321 is a deficient number, since it is larger than the sum of its proper divisors (22642479).

31674321 is an frugal number, since it uses more digits than its factorization.

31674321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097 (or 2079 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 31674321 is about 5627.9944029823. The cubic root of 31674321 is about 316.3994874110.

The spelling of 31674321 in words is "thirty-one million, six hundred seventy-four thousand, three hundred twenty-one".

Divisors: 1 3 7 9 21 27 63 81 189 243 567 729 1701 2069 2187 5103 6207 14483 15309 18621 43449 55863 130347 167589 391041 502767 1173123 1508301 3519369 4524903 10558107 31674321