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10520031 = 322915313
BaseRepresentation
bin101000001000…
…010111011111
3201210110202210
4220020113133
510143120111
61013251503
7155263434
oct50102737
921713683
1010520031
115a35945
123633b93
132244492
14157bb8b
15dcc0a6
hexa085df

10520031 has 8 divisors (see below), whose sum is σ = 14088880. Its totient is φ = 6982272.

The previous prime is 10520017. The next prime is 10520033. The reversal of 10520031 is 13002501.

10520031 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 10520031 - 219 = 9995743 is a prime.

It is a super-2 number, since 2×105200312 = 221342104481922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10519989 and 10520016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10520033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6970 + ... + 8343.

It is an arithmetic number, because the mean of its divisors is an integer number (1761110).

Almost surely, 210520031 is an apocalyptic number.

10520031 is a deficient number, since it is larger than the sum of its proper divisors (3568849).

10520031 is a wasteful number, since it uses less digits than its factorization.

10520031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15545.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 10520031 is about 3243.4597268966. The cubic root of 10520031 is about 219.1151163935.

Adding to 10520031 its reverse (13002501), we get a palindrome (23522532).

The spelling of 10520031 in words is "ten million, five hundred twenty thousand, thirty-one".

Divisors: 1 3 229 687 15313 45939 3506677 10520031