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30031197 = 371784121
BaseRepresentation
bin111001010001…
…1110101011101
32002111202001120
41302203311131
530141444242
62551401153
7513155340
oct162436535
962452046
1030031197
1115a51979
12a0831b9
1362b6251
143dba457
1529831ec
hex1ca3d5d

30031197 has 16 divisors (see below), whose sum is σ = 48454272. Its totient is φ = 16151040.

The previous prime is 30031063. The next prime is 30031201. The reversal of 30031197 is 79113003.

It is not a de Polignac number, because 30031197 - 210 = 30030173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30031597) 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, 41704 + ... + 42417.

It is an arithmetic number, because the mean of its divisors is an integer number (3028392).

Almost surely, 230031197 is an apocalyptic number.

It is an amenable number.

30031197 is a deficient number, since it is larger than the sum of its proper divisors (18423075).

30031197 is a wasteful number, since it uses less digits than its factorization.

30031197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84148.

The product of its (nonzero) digits is 567, while the sum is 24.

The square root of 30031197 is about 5480.0727184956. The cubic root of 30031197 is about 310.8309203182.

The spelling of 30031197 in words is "thirty million, thirty-one thousand, one hundred ninety-seven".

Divisors: 1 3 7 17 21 51 119 357 84121 252363 588847 1430057 1766541 4290171 10010399 30031197