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131472131 = 718781733
BaseRepresentation
bin1111101011000…
…01101100000011
3100011101110212012
413311201230003
5232124102011
621013523135
73154331450
oct765415403
9304343765
10131472131
1168237a5a
12380434ab
132131287b
1413664827
15b81ea8b
hex7d61b03

131472131 has 4 divisors (see below), whose sum is σ = 150253872. Its totient is φ = 112690392.

The previous prime is 131472073. The next prime is 131472149. The reversal of 131472131 is 131274131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131274131 = 199659669.

It is a cyclic number.

It is not a de Polignac number, because 131472131 - 218 = 131209987 is a prime.

It is a super-2 number, since 2×1314721312 = 34569842459362322, 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 = 131472097 and 131472106.

It is not an unprimeable number, because it can be changed into a prime (131472161) 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, 9390860 + ... + 9390873.

It is an arithmetic number, because the mean of its divisors is an integer number (37563468).

Almost surely, 2131472131 is an apocalyptic number.

131472131 is a deficient number, since it is larger than the sum of its proper divisors (18781741).

131472131 is an equidigital number, since it uses as much as digits as its factorization.

131472131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18781740.

The product of its digits is 504, while the sum is 23.

The square root of 131472131 is about 11466.1297306458. The cubic root of 131472131 is about 508.4847128717.

The spelling of 131472131 in words is "one hundred thirty-one million, four hundred seventy-two thousand, one hundred thirty-one".

Divisors: 1 7 18781733 131472131