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225160978 = 27446889
BaseRepresentation
bin11010110101110…
…10111100010010
3120200200100210111
431122322330102
5430120122403
634201551534
75402560000
oct1532727422
9520610714
10225160978
11106108859
12634a55aa
1337856863
1421c91a70
1514b7956d
hexd6baf12

225160978 has 20 divisors (see below), whose sum is σ = 394016670. Its totient is φ = 96495504.

The previous prime is 225160939. The next prime is 225160993. The reversal of 225160978 is 879061522.

It can be written as a sum of positive squares in only one way, i.e., 192293689 + 32867289 = 13867^2 + 5733^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 225160978.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18643 + ... + 28246.

Almost surely, 2225160978 is an apocalyptic number.

225160978 is a deficient number, since it is larger than the sum of its proper divisors (168855692).

225160978 is an frugal number, since it uses more digits than its factorization.

225160978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46919 (or 46898 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 225160978 is about 15005.3649739018. The cubic root of 225160978 is about 608.3652169357.

The spelling of 225160978 in words is "two hundred twenty-five million, one hundred sixty thousand, nine hundred seventy-eight".