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51220992 = 29333347
BaseRepresentation
bin1100001101100…
…1001000000000
310120101021222210
43003121020000
5101103032432
65025502120
71161241224
oct303311000
9116337883
1051220992
1126a050a9
12151a1940
13a7c50a4
146b34784
15476b8cc
hex30d9200

51220992 has 40 divisors (see below), whose sum is σ = 136460016. Its totient is φ = 17073152.

The previous prime is 51220991. The next prime is 51220997. The reversal of 51220992 is 29902215.

51220992 is a modest number, since divided by 20992 gives 512 as remainder.

It is not an unprimeable number, because it can be changed into a prime (51220991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15138 + ... + 18209.

Almost surely, 251220992 is an apocalyptic number.

It is an amenable number.

51220992 is an abundant number, since it is smaller than the sum of its proper divisors (85239024).

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

51220992 is an equidigital number, since it uses as much as digits as its factorization.

51220992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33368 (or 33352 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 51220992 is about 7156.8842382702. The cubic root of 51220992 is about 371.3778477930.

The spelling of 51220992 in words is "fifty-one million, two hundred twenty thousand, nine hundred ninety-two".

Divisors: 1 2 3 4 6 8 12 16 24 32 48 64 96 128 192 256 384 512 768 1536 33347 66694 100041 133388 200082 266776 400164 533552 800328 1067104 1600656 2134208 3201312 4268416 6402624 8536832 12805248 17073664 25610496 51220992