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31696900 = 22525632
BaseRepresentation
bin111100011101…
…0100000000100
32012122100222021
41320322200010
531103300100
63051212524
7533263534
oct170724004
965570867
1031696900
111698a394
12a747144
13674a481
1442d14c4
152bb1a1a
hex1e3a804

31696900 has 27 divisors (see below), whose sum is σ = 68904661. Its totient is φ = 12656240.

The previous prime is 31696879. The next prime is 31696909. The reversal of 31696900 is 969613.

The square root of 31696900 is 5630.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11410884 + 20286016 = 3378^2 + 4504^2 .

It is a super-2 number, since 2×316969002 = 2009386939220000, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31696909) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 56019 + ... + 56581.

Almost surely, 231696900 is an apocalyptic number.

31696900 is the 5630-th square number.

It is an amenable number.

31696900 is an abundant number, since it is smaller than the sum of its proper divisors (37207761).

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

31696900 is an equidigital number, since it uses as much as digits as its factorization.

31696900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The cubic root of 31696900 is about 316.4746512130.

The spelling of 31696900 in words is "thirty-one million, six hundred ninety-six thousand, nine hundred".

Divisors: 1 2 4 5 10 20 25 50 100 563 1126 2252 2815 5630 11260 14075 28150 56300 316969 633938 1267876 1584845 3169690 6339380 7924225 15848450 31696900