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2125000405 = 51138636371
BaseRepresentation
bin111111010101000…
…1110111011010101
312111002120012112201
41332222032323111
513323000003110
6550510044501
7103442130313
oct17652167325
95432505481
102125000405
119a0564290
124b37a9731
1327b3322b8
141623170b3
15c6854b3a
hex7ea8eed5

2125000405 has 8 divisors (see below), whose sum is σ = 2781818784. Its totient is φ = 1545454800.

The previous prime is 2125000333. The next prime is 2125000421. The reversal of 2125000405 is 5040005212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2125000405 - 217 = 2124869333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19318131 + ... + 19318240.

It is an arithmetic number, because the mean of its divisors is an integer number (347727348).

Almost surely, 22125000405 is an apocalyptic number.

It is an amenable number.

2125000405 is a deficient number, since it is larger than the sum of its proper divisors (656818379).

2125000405 is a wasteful number, since it uses less digits than its factorization.

2125000405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38636387.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2125000405 is about 46097.7266793060. The cubic root of 2125000405 is about 1285.6408770051.

Adding to 2125000405 its reverse (5040005212), we get a palindrome (7165005617).

The spelling of 2125000405 in words is "two billion, one hundred twenty-five million, four hundred five", and thus it is an aban number.

Divisors: 1 5 11 55 38636371 193181855 425000081 2125000405