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30468131 = 173759821
BaseRepresentation
bin111010000111…
…0100000100011
32010022221102022
41310032200203
530244440011
63005012055
7516655241
oct164164043
963287368
1030468131
1116220181
12a25402b
13640a0a5
144091791
152a1c8db
hex1d0e823

30468131 has 16 divisors (see below), whose sum is σ = 33734880. Its totient is φ = 27394560.

The previous prime is 30468107. The next prime is 30468149. The reversal of 30468131 is 13186403.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-30468131 is a prime.

It is a super-2 number, since 2×304681312 = 1856614013266322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30468131.

It is not an unprimeable number, because it can be changed into a prime (30468101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36701 + ... + 37521.

It is an arithmetic number, because the mean of its divisors is an integer number (2108430).

Almost surely, 230468131 is an apocalyptic number.

30468131 is a deficient number, since it is larger than the sum of its proper divisors (3266749).

30468131 is a wasteful number, since it uses less digits than its factorization.

30468131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 30468131 is about 5519.7944708114. The cubic root of 30468131 is about 312.3311292410.

Subtracting from 30468131 its product of nonzero digits (1728), we obtain a palindrome (30466403).

The spelling of 30468131 in words is "thirty million, four hundred sixty-eight thousand, one hundred thirty-one".

Divisors: 1 17 37 59 629 821 1003 2183 13957 30377 37111 48439 516409 823463 1792243 30468131