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10212031 = 29397887
BaseRepresentation
bin100110111101…
…001010111111
3201012211021101
4212331022333
510103241111
61002513531
7152541454
oct46751277
921184241
1010212031
1158454a5
1235058a7
13216722b
1414db82b
15d6abc1
hex9bd2bf

10212031 has 8 divisors (see below), whose sum is σ = 10602720. Its totient is φ = 9823968.

The previous prime is 10212029. The next prime is 10212061. The reversal of 10212031 is 13021201.

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

It is a cyclic number.

It is not a de Polignac number, because 10212031 - 21 = 10212029 is a prime.

It is a super-2 number, since 2×102120312 = 208571154289922, 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 = 10211999 and 10212017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212011) 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, 11070 + ... + 11956.

It is an arithmetic number, because the mean of its divisors is an integer number (1325340).

Almost surely, 210212031 is an apocalyptic number.

10212031 is a deficient number, since it is larger than the sum of its proper divisors (390689).

10212031 is an equidigital number, since it uses as much as digits as its factorization.

10212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 10212031 is about 3195.6268555637. The cubic root of 10212031 is about 216.9555218998.

Adding to 10212031 its reverse (13021201), we get a palindrome (23233232).

The spelling of 10212031 in words is "ten million, two hundred twelve thousand, thirty-one".

Divisors: 1 29 397 887 11513 25723 352139 10212031