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131501331 = 32131123943
BaseRepresentation
bin1111101011010…
…00110100010011
3100011102221220200
413311220310103
5232131020311
621014310243
73154512543
oct765506423
9304387820
10131501331
1168257995
1238058383
1321322c50
1413671323
15b828556
hex7d68d13

131501331 has 12 divisors (see below), whose sum is σ = 204557808. Its totient is φ = 80923824.

The previous prime is 131501303. The next prime is 131501333. The reversal of 131501331 is 133105131.

131501331 is a `hidden beast` number, since 131 + 501 + 3 + 31 = 666.

It is not a de Polignac number, because 131501331 - 27 = 131501203 is a prime.

It is a super-2 number, since 2×1315013312 = 34585200109543122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131501333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561855 + ... + 562088.

It is an arithmetic number, because the mean of its divisors is an integer number (17046484).

Almost surely, 2131501331 is an apocalyptic number.

131501331 is a deficient number, since it is larger than the sum of its proper divisors (73056477).

131501331 is a wasteful number, since it uses less digits than its factorization.

131501331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123962 (or 1123959 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 131501331 is about 11467.4029753907. The cubic root of 131501331 is about 508.5223549545.

Adding to 131501331 its reverse (133105131), we get a palindrome (264606462).

The spelling of 131501331 in words is "one hundred thirty-one million, five hundred one thousand, three hundred thirty-one".

Divisors: 1 3 9 13 39 117 1123943 3371829 10115487 14611259 43833777 131501331