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315502061 = 7711394567
BaseRepresentation
bin10010110011100…
…010110111101101
3210222200011110112
4102303202313231
51121232031221
651150145405
710550503040
oct2263426755
9728604415
10315502061
11152102406
12897b2265
1350497b14
142dc8ac57
151ca7215b
hex12ce2ded

315502061 has 16 divisors (see below), whose sum is σ = 368363520. Its totient is φ = 264645360.

The previous prime is 315502043. The next prime is 315502069. The reversal of 315502061 is 160205513.

It is not a de Polignac number, because 315502061 - 210 = 315501037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315502069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66800 + ... + 71366.

It is an arithmetic number, because the mean of its divisors is an integer number (23022720).

Almost surely, 2315502061 is an apocalyptic number.

It is an amenable number.

315502061 is a deficient number, since it is larger than the sum of its proper divisors (52861459).

315502061 is a wasteful number, since it uses less digits than its factorization.

315502061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 315502061 is about 17762.3776843079. The cubic root of 315502061 is about 680.7705085269.

Adding to 315502061 its reverse (160205513), we get a palindrome (475707574).

The spelling of 315502061 in words is "three hundred fifteen million, five hundred two thousand, sixty-one".

Divisors: 1 7 71 139 497 973 4567 9869 31969 69083 324257 634813 2269799 4443691 45071723 315502061