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131032061 = 1091202129
BaseRepresentation
bin1111100111101…
…10001111111101
3100010120010012022
413303312033331
5232021011221
621000245525
73150516446
oct763661775
9303503168
10131032061
1167a67366
1237a708a5
13211ba484
141358c2cd
15b7844ab
hex7cf63fd

131032061 has 4 divisors (see below), whose sum is σ = 132234300. Its totient is φ = 129829824.

The previous prime is 131031997. The next prime is 131032067. The reversal of 131032061 is 160230131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160230131 = 1371169563.

It can be written as a sum of positive squares in 2 ways, for example, as 40896025 + 90136036 = 6395^2 + 9494^2 .

It is a cyclic number.

It is not a de Polignac number, because 131032061 - 26 = 131031997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131032067) 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, 600956 + ... + 601173.

It is an arithmetic number, because the mean of its divisors is an integer number (33058575).

Almost surely, 2131032061 is an apocalyptic number.

It is an amenable number.

131032061 is a deficient number, since it is larger than the sum of its proper divisors (1202239).

131032061 is a wasteful number, since it uses less digits than its factorization.

131032061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202238.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 131032061 is about 11446.9236478628. The cubic root of 131032061 is about 507.9167369788.

Adding to 131032061 its reverse (160230131), we get a palindrome (291262192).

The spelling of 131032061 in words is "one hundred thirty-one million, thirty-two thousand, sixty-one".

Divisors: 1 109 1202129 131032061