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130023131 = 718574733
BaseRepresentation
bin1111011111111…
…11111011011011
3100001122212012112
413233333323123
5231241220011
620522502535
73136115120
oct757777333
9301585175
10130023131
1167438337
1237664a4b
1320c26184
14133a8747
15b63558b
hex7bffedb

130023131 has 4 divisors (see below), whose sum is σ = 148597872. Its totient is φ = 111448392.

The previous prime is 130023121. The next prime is 130023139. The reversal of 130023131 is 131320031.

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 130023131 - 26 = 130023067 is a prime.

It is a super-2 number, since 2×1300231312 = 33812029190086322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130023139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9287360 + ... + 9287373.

It is an arithmetic number, because the mean of its divisors is an integer number (37149468).

Almost surely, 2130023131 is an apocalyptic number.

130023131 is a deficient number, since it is larger than the sum of its proper divisors (18574741).

130023131 is an equidigital number, since it uses as much as digits as its factorization.

130023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18574740.

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

The square root of 130023131 is about 11402.7685673261. The cubic root of 130023131 is about 506.6097455003.

Adding to 130023131 its reverse (131320031), we get a palindrome (261343162).

The spelling of 130023131 in words is "one hundred thirty million, twenty-three thousand, one hundred thirty-one".

Divisors: 1 7 18574733 130023131