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97111231 = 719371881
BaseRepresentation
bin1011100100111…
…00110010111111
320202201202120021
411302130302333
5144330024411
613345233011
72256301060
oct562346277
9222652507
1097111231
114a8a9118
1228632767
1317171989
14cc7c567
1587d3a71
hex5c9ccbf

97111231 has 8 divisors (see below), whose sum is σ = 111560864. Its totient is φ = 82805760.

The previous prime is 97111229. The next prime is 97111237. The reversal of 97111231 is 13211179.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97111231 - 21 = 97111229 is a prime.

It is a super-2 number, since 2×971112312 = 18861182372670722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97111196 and 97111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97111237) 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 7 ways as a sum of consecutive naturals, for example, 34590 + ... + 37291.

It is an arithmetic number, because the mean of its divisors is an integer number (13945108).

Almost surely, 297111231 is an apocalyptic number.

97111231 is the 5690-th hex number.

97111231 is a deficient number, since it is larger than the sum of its proper divisors (14449633).

97111231 is a wasteful number, since it uses less digits than its factorization.

97111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72081.

The product of its digits is 378, while the sum is 25.

The square root of 97111231 is about 9854.5030823477. The cubic root of 97111231 is about 459.6456486531.

The spelling of 97111231 in words is "ninety-seven million, one hundred eleven thousand, two hundred thirty-one".

Divisors: 1 7 193 1351 71881 503167 13873033 97111231