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52014781 = 7131733623
BaseRepresentation
bin1100011001101…
…0111010111101
310121212121212101
43012122322331
5101303433111
65054505101
71201055410
oct306327275
9117777771
1052014781
11273a7525
1215505191
13aa124a0
146c9db77
154876bc1
hex319aebd

52014781 has 16 divisors (see below), whose sum is σ = 67785984. Its totient is φ = 38732544.

The previous prime is 52014779. The next prime is 52014791. The reversal of 52014781 is 18741025.

52014781 is nontrivially palindromic in base 3.

52014781 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is not a de Polignac number, because 52014781 - 21 = 52014779 is a prime.

It is a super-2 number, since 2×520147812 = 5411074884955922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52014701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15265 + ... + 18358.

It is an arithmetic number, because the mean of its divisors is an integer number (4236624).

Almost surely, 252014781 is an apocalyptic number.

It is an amenable number.

52014781 is a deficient number, since it is larger than the sum of its proper divisors (15771203).

52014781 is a wasteful number, since it uses less digits than its factorization.

52014781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33660.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 52014781 is about 7212.1273560580. The cubic root of 52014781 is about 373.2864778746.

The spelling of 52014781 in words is "fifty-two million, fourteen thousand, seven hundred eighty-one".

Divisors: 1 7 13 17 91 119 221 1547 33623 235361 437099 571591 3059693 4001137 7430683 52014781