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130311023 = 643202661
BaseRepresentation
bin1111100010001…
…10001101101111
3100002012111010012
413301012031233
5231324423043
620533003435
73141424343
oct761061557
9302174105
10130311023
1167614667
123778357b
1320cc721b
1413441623
15b690a18
hex7c4636f

130311023 has 4 divisors (see below), whose sum is σ = 130514328. Its totient is φ = 130107720.

The previous prime is 130310989. The next prime is 130311043. The reversal of 130311023 is 320113031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 130311023 - 214 = 130294639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130310989 and 130311007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130311043) 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, 100688 + ... + 101973.

It is an arithmetic number, because the mean of its divisors is an integer number (32628582).

Almost surely, 2130311023 is an apocalyptic number.

130311023 is a deficient number, since it is larger than the sum of its proper divisors (203305).

130311023 is an equidigital number, since it uses as much as digits as its factorization.

130311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203304.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 130311023 is about 11415.3853636222. The cubic root of 130311023 is about 506.9833748684.

Adding to 130311023 its reverse (320113031), we get a palindrome (450424054).

The spelling of 130311023 in words is "one hundred thirty million, three hundred eleven thousand, twenty-three".

Divisors: 1 643 202661 130311023