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131033660 = 22517337871
BaseRepresentation
bin1111100111101…
…10101000111100
3100010120012101112
413303312220330
5232021034120
621000301152
73150524222
oct763665074
9303505345
10131033660
1167a6858a
1237a717b8
13211bb114
141358cb12
15b784bc5
hex7cf6a3c

131033660 has 24 divisors (see below), whose sum is σ = 276768576. Its totient is φ = 52109120.

The previous prime is 131033659. The next prime is 131033713. The reversal of 131033660 is 66330131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15476 + ... + 22395.

It is an arithmetic number, because the mean of its divisors is an integer number (11532024).

Almost surely, 2131033660 is an apocalyptic number.

131033660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131033660 is an abundant number, since it is smaller than the sum of its proper divisors (145734916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131033660 is a wasteful number, since it uses less digits than its factorization.

131033660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38053 (or 38051 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 131033660 is about 11446.9934917427. The cubic root of 131033660 is about 507.9188030267.

Adding to 131033660 its reverse (66330131), we get a palindrome (197363791).

The spelling of 131033660 in words is "one hundred thirty-one million, thirty-three thousand, six hundred sixty".

Divisors: 1 2 4 5 10 20 173 346 692 865 1730 3460 37871 75742 151484 189355 378710 757420 6551683 13103366 26206732 32758415 65516830 131033660