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311010013221 = 3375352865887
BaseRepresentation
bin1001000011010011010…
…01000011000000100101
31002201202211012122112120
410201221221003000211
520043422030410341
6354513115540153
731320055331265
oct4415151030045
91081684178476
10311010013221
1110a998054186
125033875a659
1323435b50b2b
14110a549b7a5
15815407a066
hex4869a43025

311010013221 has 16 divisors (see below), whose sum is σ = 433923208704. Its totient is φ = 197929877184.

The previous prime is 311010013213. The next prime is 311010013231. The reversal of 311010013221 is 122310010113.

It is a happy number.

It is not a de Polignac number, because 311010013221 - 23 = 311010013213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311010013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311010013211) 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, 26427061 + ... + 26438826.

It is an arithmetic number, because the mean of its divisors is an integer number (27120200544).

Almost surely, 2311010013221 is an apocalyptic number.

It is an amenable number.

311010013221 is a deficient number, since it is larger than the sum of its proper divisors (122913195483).

311010013221 is a wasteful number, since it uses less digits than its factorization.

311010013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52865980.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 311010013221 its reverse (122310010113), we get a palindrome (433320023334).

The spelling of 311010013221 in words is "three hundred eleven billion, ten million, thirteen thousand, two hundred twenty-one".

Divisors: 1 3 37 53 111 159 1961 5883 52865887 158597661 1956037819 2801892011 5868113457 8405676033 103670004407 311010013221