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131039190 = 23251455991
BaseRepresentation
bin1111100111101…
…11111111010110
3100010120110222100
413303313333112
5232021223230
621000342530
73150546312
oct763677726
9303513870
10131039190
1167a71757
1237a74a46
13211c07a9
1413590b42
15b786660
hex7cf7fd6

131039190 has 24 divisors (see below), whose sum is σ = 340702128. Its totient is φ = 34943760.

The previous prime is 131039173. The next prime is 131039191. The reversal of 131039190 is 91930131.

It is a super-2 number, since 2×1310391902 = 34342538631712200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131039191) 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, 727906 + ... + 728085.

It is an arithmetic number, because the mean of its divisors is an integer number (14195922).

Almost surely, 2131039190 is an apocalyptic number.

131039190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131039190 is an abundant number, since it is smaller than the sum of its proper divisors (209662938).

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

131039190 is a wasteful number, since it uses less digits than its factorization.

131039190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456004 (or 1456001 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 131039190 is about 11447.2350373354. The cubic root of 131039190 is about 507.9259481411.

The spelling of 131039190 in words is "one hundred thirty-one million, thirty-nine thousand, one hundred ninety".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 90 1455991 2911982 4367973 7279955 8735946 13103919 14559910 21839865 26207838 43679730 65519595 131039190