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131525131 = 149882719
BaseRepresentation
bin1111101011011…
…10101000001011
3100011111011120011
413311232220023
5232132301011
621015012351
73154642123
oct765565013
9304434504
10131525131
1168273861
123806a0b7
1321330a2a
1413679c83
15b830621
hex7d6ea0b

131525131 has 4 divisors (see below), whose sum is σ = 132408000. Its totient is φ = 130642264.

The previous prime is 131525071. The next prime is 131525143.

131525131 is nontrivially palindromic in base 10.

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 131525131 - 29 = 131524619 is a prime.

It is a super-2 number, since 2×1315251312 = 34597720169134322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131525161) 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, 441211 + ... + 441508.

It is an arithmetic number, because the mean of its divisors is an integer number (33102000).

Almost surely, 2131525131 is an apocalyptic number.

131525131 is a deficient number, since it is larger than the sum of its proper divisors (882869).

131525131 is an equidigital number, since it uses as much as digits as its factorization.

131525131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882868.

The product of its digits is 450, while the sum is 22.

The square root of 131525131 is about 11468.4406525037. The cubic root of 131525131 is about 508.5530317085.

The spelling of 131525131 in words is "one hundred thirty-one million, five hundred twenty-five thousand, one hundred thirty-one".

Divisors: 1 149 882719 131525131