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55152853 = 77878979
BaseRepresentation
bin1101001001100…
…1000011010101
310211210001111021
43102121003111
5103104342403
65250041141
71236535330
oct322310325
9124701437
1055152853
1129150178
12165791b1
13b570932
147479617
154c968bd
hex34990d5

55152853 has 4 divisors (see below), whose sum is σ = 63031840. Its totient is φ = 47273868.

The previous prime is 55152847. The next prime is 55152863. The reversal of 55152853 is 35825155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35825155 = 57165031.

It is a cyclic number.

It is not a de Polignac number, because 55152853 - 25 = 55152821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55152803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3939483 + ... + 3939496.

It is an arithmetic number, because the mean of its divisors is an integer number (15757960).

Almost surely, 255152853 is an apocalyptic number.

It is an amenable number.

55152853 is a deficient number, since it is larger than the sum of its proper divisors (7878987).

55152853 is an equidigital number, since it uses as much as digits as its factorization.

55152853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878986.

The product of its digits is 30000, while the sum is 34.

The square root of 55152853 is about 7426.4966841708. The cubic root of 55152853 is about 380.6472188176.

The spelling of 55152853 in words is "fifty-five million, one hundred fifty-two thousand, eight hundred fifty-three".

Divisors: 1 7 7878979 55152853