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52708931 = 1131992
BaseRepresentation
bin1100100100010…
…0011001000011
310200011220001122
43021010121003
5101443141211
65121422455
71210006232
oct311043103
9120156048
1052708931
1127831000
121579aa2b
13abc6422
147000b19
1549626db
hex3244643

52708931 has 12 divisors (see below), whose sum is σ = 58268664. Its totient is φ = 47676420.

The previous prime is 52708913. The next prime is 52708961. The reversal of 52708931 is 13980725.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a de Polignac number, because none of the positive numbers 2k-52708931 is a prime.

It is a super-2 number, since 2×527089312 = 5556462814325522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52708891 and 52708900.

It is not an unprimeable number, because it can be changed into a prime (52708961) 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, 264770 + ... + 264968.

It is an arithmetic number, because the mean of its divisors is an integer number (4855722).

Almost surely, 252708931 is an apocalyptic number.

52708931 is a deficient number, since it is larger than the sum of its proper divisors (5559733).

52708931 is an frugal number, since it uses more digits than its factorization.

52708931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 52708931 is about 7260.0916660880. The cubic root of 52708931 is about 374.9396785937.

The spelling of 52708931 in words is "fifty-two million, seven hundred eight thousand, nine hundred thirty-one".

Divisors: 1 11 121 199 1331 2189 24079 39601 264869 435611 4791721 52708931