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203131799707 = 19463187912289
BaseRepresentation
bin1011110100101110011…
…0010100100010011011
3201102022121022121001011
42331023212110202123
511312003220042312
6233152323234351
720450536544254
oct2751346244233
9642277277034
10203131799707
1179169672721
12334505189b7
13162030cc3b5
149b8ddd5b2b
15543d39eda7
hex2f4b99489b

203131799707 has 16 divisors (see below), whose sum is σ = 214416256000. Its totient is φ = 191907201024.

The previous prime is 203131799701. The next prime is 203131799729. The reversal of 203131799707 is 707997131302.

It is a cyclic number.

It is not a de Polignac number, because 203131799707 - 219 = 203131275419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203131799701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16523419 + ... + 16535707.

It is an arithmetic number, because the mean of its divisors is an integer number (13401016000).

Almost surely, 2203131799707 is an apocalyptic number.

203131799707 is a deficient number, since it is larger than the sum of its proper divisors (11284456293).

203131799707 is a wasteful number, since it uses less digits than its factorization.

203131799707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14650.

The product of its (nonzero) digits is 500094, while the sum is 49.

The spelling of 203131799707 in words is "two hundred three billion, one hundred thirty-one million, seven hundred ninety-nine thousand, seven hundred seven".

Divisors: 1 19 463 1879 8797 12289 35701 233491 869977 5689807 16529563 23091031 108106333 438729589 10691147353 203131799707