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80231823 = 3371724971
BaseRepresentation
bin1001100100000…
…11110110001111
312120222012101000
410302003312033
5131014404243
611543351343
71662650010
oct462036617
9176865330
1080231823
114131a3a1
1222a52553
1313811a69
14a927007
15709c5d3
hex4c83d8f

80231823 has 32 divisors (see below), whose sum is σ = 143838720. Its totient is φ = 43148160.

The previous prime is 80231821. The next prime is 80231839. The reversal of 80231823 is 32813208.

It is not a de Polignac number, because 80231823 - 21 = 80231821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80231821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9273 + ... + 15698.

It is an arithmetic number, because the mean of its divisors is an integer number (4494960).

Almost surely, 280231823 is an apocalyptic number.

80231823 is a deficient number, since it is larger than the sum of its proper divisors (63606897).

80231823 is a wasteful number, since it uses less digits than its factorization.

80231823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25004 (or 24998 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 80231823 is about 8957.2218349218. The cubic root of 80231823 is about 431.3027428875.

The spelling of 80231823 in words is "eighty million, two hundred thirty-one thousand, eight hundred twenty-three".

Divisors: 1 3 7 9 17 21 27 51 63 119 153 189 357 459 1071 3213 24971 74913 174797 224739 424507 524391 674217 1273521 1573173 2971549 3820563 4719519 8914647 11461689 26743941 80231823