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85195031 = 1937911831
BaseRepresentation
bin1010001001111…
…11100100010111
312221022100121112
411010333210113
5133302220111
612242005235
72053101005
oct504774427
9187270545
1085195031
11440aa319
122464681b
131485bb7c
14b459a75
15772ce8b
hex513f917

85195031 has 8 divisors (see below), whose sum is σ = 89923200. Its totient is φ = 80491320.

The previous prime is 85195027. The next prime is 85195039. The reversal of 85195031 is 13059158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85195031 - 22 = 85195027 is a prime.

It is a super-2 number, since 2×851950312 = 14516386614181922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85195039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 13116.

It is an arithmetic number, because the mean of its divisors is an integer number (11240400).

Almost surely, 285195031 is an apocalyptic number.

85195031 is a deficient number, since it is larger than the sum of its proper divisors (4728169).

85195031 is a wasteful number, since it uses less digits than its factorization.

85195031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12229.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 85195031 is about 9230.1154380647. The cubic root of 85195031 is about 440.0189919488.

The spelling of 85195031 in words is "eighty-five million, one hundred ninety-five thousand, thirty-one".

Divisors: 1 19 379 7201 11831 224789 4483949 85195031