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57312012 = 2234776001
BaseRepresentation
bin1101101010100…
…0001100001100
310222211202022010
43122220030030
5104132441022
65404221220
71264100262
oct332501414
9128752263
1057312012
112a3953aa
121723a810
13bb48644
14787c432
15507150c
hex36a830c

57312012 has 12 divisors (see below), whose sum is σ = 133728056. Its totient is φ = 19104000.

The previous prime is 57311983. The next prime is 57312019. The reversal of 57312012 is 21021375.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 57312012.

It is not an unprimeable number, because it can be changed into a prime (57312019) 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 3 ways as a sum of consecutive naturals, for example, 2387989 + ... + 2388012.

Almost surely, 257312012 is an apocalyptic number.

It is an amenable number.

57312012 is an abundant number, since it is smaller than the sum of its proper divisors (76416044).

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

57312012 is a wasteful number, since it uses less digits than its factorization.

57312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776008 (or 4776006 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 57312012 is about 7570.4697344352. The cubic root of 57312012 is about 385.5510454056.

Adding to 57312012 its reverse (21021375), we get a palindrome (78333387).

The spelling of 57312012 in words is "fifty-seven million, three hundred twelve thousand, twelve".

Divisors: 1 2 3 4 6 12 4776001 9552002 14328003 19104004 28656006 57312012