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30131101 = 7111331971
BaseRepresentation
bin111001011110…
…0001110011101
32002200211002201
41302330032131
530203143401
62553451501
7514052530
oct162741635
962624081
1030131101
111600aa40
12a110b91
13631c870
144004a17
1529a2b01
hex1cbc39d

30131101 has 32 divisors (see below), whose sum is σ = 41803776. Its totient is φ = 20952000.

The previous prime is 30131071. The next prime is 30131107. The reversal of 30131101 is 10113103.

It is a cyclic number.

It is not a de Polignac number, because 30131101 - 25 = 30131069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30546 + ... + 31516.

It is an arithmetic number, because the mean of its divisors is an integer number (1306368).

Almost surely, 230131101 is an apocalyptic number.

30131101 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30131101 is a deficient number, since it is larger than the sum of its proper divisors (11672675).

30131101 is a wasteful number, since it uses less digits than its factorization.

30131101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 30131101 is about 5489.1803577583. The cubic root of 30131101 is about 311.1752165188.

Adding to 30131101 its reverse (10113103), we get a palindrome (40244204).

It can be divided in two parts, 3013 and 1101, that added together give a palindrome (4114).

The spelling of 30131101 in words is "thirty million, one hundred thirty-one thousand, one hundred one".

Divisors: 1 7 11 13 31 77 91 143 217 341 403 971 1001 2387 2821 4433 6797 10681 12623 30101 31031 74767 88361 138853 210707 331111 391313 971971 2317777 2739191 4304443 30131101