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31310430001 = 311010013871
BaseRepresentation
bin11101001010001111…
…110011111100110001
32222211002002122101121
4131022033303330301
51003110432230001
622214523102241
72155621156324
oct351217637461
988732078347
1031310430001
1112307a15534
126099971981
132c4ca12576
1417304c27bb
15c33bc96a1
hex74a3f3f31

31310430001 has 4 divisors (see below), whose sum is σ = 32320443904. Its totient is φ = 30300416100.

The previous prime is 31310429977. The next prime is 31310430007. The reversal of 31310430001 is 10003401313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10003401313 = 53188743421.

It is a cyclic number.

It is not a de Polignac number, because 31310430001 - 225 = 31276875569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31310430007) 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, 505006905 + ... + 505006966.

It is an arithmetic number, because the mean of its divisors is an integer number (8080110976).

Almost surely, 231310430001 is an apocalyptic number.

31310430001 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31310430001 is a deficient number, since it is larger than the sum of its proper divisors (1010013903).

31310430001 is a wasteful number, since it uses less digits than its factorization.

31310430001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010013902.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31310430001 its reverse (10003401313), we get a palindrome (41313831314).

The spelling of 31310430001 in words is "thirty-one billion, three hundred ten million, four hundred thirty thousand, one".

Divisors: 1 31 1010013871 31310430001